Basic Geometrical Optics
... In Figure 3-2b, circular wave fronts are shown with radial lines drawn perpendicular to them along several directions. Each of the rays describes the motion of a restricted part of the wave front along a particular direction. Geometrically then, a ray is a line perpendicular to a series of successiv ...
... In Figure 3-2b, circular wave fronts are shown with radial lines drawn perpendicular to them along several directions. Each of the rays describes the motion of a restricted part of the wave front along a particular direction. Geometrically then, a ray is a line perpendicular to a series of successiv ...
uncorrected page proofs
... the object. When you look in the mirror, what you see is an image of your head. Assuming that the mirror you are looking at is a plane (flat) mirror, you can see that the image is about the same size as you would expect your head to be when viewed at that distance, and it is the right way up. We des ...
... the object. When you look in the mirror, what you see is an image of your head. Assuming that the mirror you are looking at is a plane (flat) mirror, you can see that the image is about the same size as you would expect your head to be when viewed at that distance, and it is the right way up. We des ...
observability and uv coverage
... 2.2 Filling the uv-plane Figure 1b shows that the sinusoid characteristics (that is the binary parameters) could have been recovered with only a few points in the uv-plane provided that they were well selected. This shows how easy, simple target characterisation is, using stellar interferometry. In ...
... 2.2 Filling the uv-plane Figure 1b shows that the sinusoid characteristics (that is the binary parameters) could have been recovered with only a few points in the uv-plane provided that they were well selected. This shows how easy, simple target characterisation is, using stellar interferometry. In ...
glossary of optical terms
... material deposited on a transparent substrate. aperture, relative. Diameter of the entrance pupil of a lens or optical system measured in terms of the equivalent focal length of that lens or system. It is written as a fraction in which f, the equivalent focal length, is the numerator, and it is symb ...
... material deposited on a transparent substrate. aperture, relative. Diameter of the entrance pupil of a lens or optical system measured in terms of the equivalent focal length of that lens or system. It is written as a fraction in which f, the equivalent focal length, is the numerator, and it is symb ...
Chapter 25 Galaxies and Dark Matter
... Quasars are all very distant, and the light coming to us from them has probably gone through many interesting regions. We can learn about the intervening space by careful study of quasar spectra. ...
... Quasars are all very distant, and the light coming to us from them has probably gone through many interesting regions. We can learn about the intervening space by careful study of quasar spectra. ...
Basic Geometrical Optics
... In Figure 3-2b, circular wave fronts are shown with radial lines drawn perpendicular to them along several directions. Each of the rays describes the motion of a restricted part of the wave front along a particular direction. Geometrically then, a ray is a line perpendicular to a series of successiv ...
... In Figure 3-2b, circular wave fronts are shown with radial lines drawn perpendicular to them along several directions. Each of the rays describes the motion of a restricted part of the wave front along a particular direction. Geometrically then, a ray is a line perpendicular to a series of successiv ...
1987aj 93.1057n the astronomical journal volume 93, number 5 may
... given in Table I along with similar observations from Rieke et al. (1985). Although the slit scans described below were photometrically calibrated, and agree with the results in Table I, the photometry in Table I is more precise than that obtained with the slit scans, and will be used in the followi ...
... given in Table I along with similar observations from Rieke et al. (1985). Although the slit scans described below were photometrically calibrated, and agree with the results in Table I, the photometry in Table I is more precise than that obtained with the slit scans, and will be used in the followi ...
10.1 Ray Optics: Reflection and Refraction
... From observations and experiments, we know that the angle of incidence is always equal to the angle of reflection. That is, light reflects at the same angle at which it strikes the smooth surface of a material. This is called the law of reflection. Note that the incident ray, the normal, and the re ...
... From observations and experiments, we know that the angle of incidence is always equal to the angle of reflection. That is, light reflects at the same angle at which it strikes the smooth surface of a material. This is called the law of reflection. Note that the incident ray, the normal, and the re ...
Q -1 name some phenomena associated with light. ans – 1) image
... Q – 77 what are thin lenses with small apertures? ans – such lenses whose aperture is much less than its radius of curvature are called thin lenses with small apertures. Q -78 what happens when the sunlight is passed through a convex lens on a paper? ans - the paper begins to burn producing smoke. i ...
... Q – 77 what are thin lenses with small apertures? ans – such lenses whose aperture is much less than its radius of curvature are called thin lenses with small apertures. Q -78 what happens when the sunlight is passed through a convex lens on a paper? ans - the paper begins to burn producing smoke. i ...
lenses and mirrors
... enters and exits the lens at different distances from the optical axis, the horizontal line through the center of the lens. A thin lens represents an ideal situation in which light enters and exits the lens at the same level (Figure 5.1). That is, light is assumed to bend at one plane in space, and ...
... enters and exits the lens at different distances from the optical axis, the horizontal line through the center of the lens. A thin lens represents an ideal situation in which light enters and exits the lens at the same level (Figure 5.1). That is, light is assumed to bend at one plane in space, and ...
Determining the Effect of Diffuse X-ray Emission on Point Source Detection
... more detailed studies of the effects of other factors on source visibility. The question we explore here is: how does the background radiation from diffuse gas in the GC affect X-ray point source visibility? Once this question has been answered, we can try to understand the nature of the many detected ...
... more detailed studies of the effects of other factors on source visibility. The question we explore here is: how does the background radiation from diffuse gas in the GC affect X-ray point source visibility? Once this question has been answered, we can try to understand the nature of the many detected ...
Article PDF - IOPscience
... out with a wide-field camera (Gunn et al. 1998) that makes nearly simultaneous observations of objects in five passbands: u, g, r, i, and z. Together, the passbands cover the optical wavelengths from the atmospheric cutoff in the blue to the minimum detectable energy for the silicon CCDs in the red ...
... out with a wide-field camera (Gunn et al. 1998) that makes nearly simultaneous observations of objects in five passbands: u, g, r, i, and z. Together, the passbands cover the optical wavelengths from the atmospheric cutoff in the blue to the minimum detectable energy for the silicon CCDs in the red ...
Ans. - Testlabz.com
... Ans. When the rays of light travelling through water, strike the water air interface of the bubble at an angle which is greater than critical angle for water, they get totally internally reflected. These reflected rays on reaching the eye appear to come from the air bubble, which in turn appears sil ...
... Ans. When the rays of light travelling through water, strike the water air interface of the bubble at an angle which is greater than critical angle for water, they get totally internally reflected. These reflected rays on reaching the eye appear to come from the air bubble, which in turn appears sil ...
Phys. Rev. - Cinvestav
... discussion beyond further introducing an extra free parameter, as the remaining fraction of the halo mass still has to be accounted for through a separate type of dark matter. As long as a unique type of dark matter at all galactic and cosmological scales remains feasible, we believe this is the fra ...
... discussion beyond further introducing an extra free parameter, as the remaining fraction of the halo mass still has to be accounted for through a separate type of dark matter. As long as a unique type of dark matter at all galactic and cosmological scales remains feasible, we believe this is the fra ...
Ch17 Refraction - Van Buren Public Schools
... consistent with Snell's law, are summarized below. – Light is bent toward the normal when it slows down because it has entered a material with a higher index of refraction. – Light is bent away from the normal when it speeds up because it has entered a material with a lower index of refraction. – Th ...
... consistent with Snell's law, are summarized below. – Light is bent toward the normal when it slows down because it has entered a material with a higher index of refraction. – Light is bent away from the normal when it speeds up because it has entered a material with a lower index of refraction. – Th ...
STELLAR MASSES AND STAR FORMATION RATES OF LENSED DUSTY STAR-FORMING... FROM THE SPT SURVEY
... redshifts and robust lens models derived from ALMA observations. We have conducted follow-up observations, obtaining multi-wavelength imaging data, using HST, Spitzer, Herschel and the Atacama Pathfinder EXperiment (APEX). We use the high-resolution HST/WFC3 images to disentangle the background sour ...
... redshifts and robust lens models derived from ALMA observations. We have conducted follow-up observations, obtaining multi-wavelength imaging data, using HST, Spitzer, Herschel and the Atacama Pathfinder EXperiment (APEX). We use the high-resolution HST/WFC3 images to disentangle the background sour ...
refraction - Ingrum.com
... Since the atmosphere is denser near the earth's surface, a ray of light from the sun or a star striking the atmosphere Rgure 14-6. The sun is visible obliquely foHows a path suggested by the curve shown in before actual sunrise and after Figure 14-6. There is no abrupt refraction such as that actual ...
... Since the atmosphere is denser near the earth's surface, a ray of light from the sun or a star striking the atmosphere Rgure 14-6. The sun is visible obliquely foHows a path suggested by the curve shown in before actual sunrise and after Figure 14-6. There is no abrupt refraction such as that actual ...
COACHING CLASS HARA 10.LIGHT
... reflection of light takes place from the inner surface. This mirror resembles the shape of a ‘cave’. A Painted surface is a non-reflecting surface. Convex mirrors A convex mirror is a spherical mirror whose reflecting surface is curved outwards. In a convex mirror, the reflection of light takes plac ...
... reflection of light takes place from the inner surface. This mirror resembles the shape of a ‘cave’. A Painted surface is a non-reflecting surface. Convex mirrors A convex mirror is a spherical mirror whose reflecting surface is curved outwards. In a convex mirror, the reflection of light takes plac ...
CHAPTER – 10 LIGHT : REFLECTION AND REFRACTION
... 9) New Cartesian sign convention for spherical mirrors :i) The object is always placed on the left of the mirror and light from the object falls from the left to the right. ii) All distances parallel to the principal axis are measured from the pole. iii) All distances measured to the right of the po ...
... 9) New Cartesian sign convention for spherical mirrors :i) The object is always placed on the left of the mirror and light from the object falls from the left to the right. ii) All distances parallel to the principal axis are measured from the pole. iii) All distances measured to the right of the po ...
The Evryscope: the first full-sky gigapixel-scale telescope Nicholas Law
... Visible-light counterparts to rapid transients, without needing pointing Post-facto localization of gravitational wave counterparts, Friday, August 21, 15 ...
... Visible-light counterparts to rapid transients, without needing pointing Post-facto localization of gravitational wave counterparts, Friday, August 21, 15 ...
"Seeing" Dark Matter
... far more gravity than the observed normal matter and the conventional law of gravity can explain. The separation of gas from galaxies and any dark matter during cluster collisions provides us, for the first time, a method of directly testing whether dark matter exists, even if the “universal” law of ...
... far more gravity than the observed normal matter and the conventional law of gravity can explain. The separation of gas from galaxies and any dark matter during cluster collisions provides us, for the first time, a method of directly testing whether dark matter exists, even if the “universal” law of ...
III-Advanced Lithography
... The value of sin a for an optical system is the numerical aperture, or NA. If the value of the NA is small for a system, fewer orders will be imaged, and the grating may not be resolved. It has been shown that the depth of focus, DOF, or the range of focus for which a feature can be resolved, is giv ...
... The value of sin a for an optical system is the numerical aperture, or NA. If the value of the NA is small for a system, fewer orders will be imaged, and the grating may not be resolved. It has been shown that the depth of focus, DOF, or the range of focus for which a feature can be resolved, is giv ...
Section 2 Thin Lenses Chapter 14 Sample Problem, continued
... indicate a real, inverted, smaller image. This is expected because the object distance is longer than twice the focal length of the converging lens. The values and signs for the diverging lens indicate a virtual, upright, smaller image formed inside the focal point. This is the only kind of image di ...
... indicate a real, inverted, smaller image. This is expected because the object distance is longer than twice the focal length of the converging lens. The values and signs for the diverging lens indicate a virtual, upright, smaller image formed inside the focal point. This is the only kind of image di ...
The behaviour of dark matter associated with 4 bright cluster
... Gemini spectroscopy to obtain a redshift z = 0.204. However, our IFU spectroscopy did not confirm this. We instead found only one bright emission line at 835.5 nm, which is not associated with lines at the foreground cluster redshift and whose 2D morphology traces the lensed image. The emission line ...
... Gemini spectroscopy to obtain a redshift z = 0.204. However, our IFU spectroscopy did not confirm this. We instead found only one bright emission line at 835.5 nm, which is not associated with lines at the foreground cluster redshift and whose 2D morphology traces the lensed image. The emission line ...
Interpretation of the Helix Planetary Nebula using Hydro
... triggered the first gravitational structures in the primordial fluids of interest were likely nonacoustic (non-barotropic) density variations from turbulent mixing of temperature or chemical species concentrations produced by the big bang (Gibson 2001) as shown by turbulent signatures (Bershadskii and ...
... triggered the first gravitational structures in the primordial fluids of interest were likely nonacoustic (non-barotropic) density variations from turbulent mixing of temperature or chemical species concentrations produced by the big bang (Gibson 2001) as shown by turbulent signatures (Bershadskii and ...
Gravitational microlensing
Gravitational microlensing is an astronomical phenomenon due to the gravitational lens effect. It can be used to detect objects that range from the mass of a planet to the mass of a star, regardless of the light they emit. Typically, astronomers can only detect bright objects that emit much light (stars) or large objects that block background light (clouds of gas and dust). These objects make up only a tiny portion of the mass of a galaxy. Microlensing allows the study of objects that emit little or no light.When a distant star or quasar gets sufficiently aligned with a massive compact foreground object, the bending of light due to its gravitational field, as discussed by Einstein in 1915, leads to two distorted unresolved images resulting in an observable magnification. The time-scale of the transient brightening depends on the mass of the foreground object as well as on the relative proper motion between the background 'source' and the foreground 'lens' object.Since microlensing observations do not rely on radiation received from the lens object, this effect therefore allows astronomers to study massive objects no matter how faint. It is thus an ideal technique to study the galactic population of such faint or dark objects as brown dwarfs, red dwarfs, planets, white dwarfs, neutron stars, black holes, andMassive Compact Halo Objects. Moreover, the microlensing effect is wavelength-independent, allowing study of source objects that emit any kind of electromagnetic radiation.Microlensing by an isolated object was first detected in 1989. Since then, microlensing has been used to constrain the nature of the dark matter, detect extrasolar planets, study limb darkening in distant stars, constrain the binary star population, and constrain the structure of the Milky Way's disk. Microlensing has also been proposed as a means to find dark objects like brown dwarfs and black holes, study starspots, measure stellar rotation, and probe quasars including their accretion disks.