Binary Star Systems
... – Sufficiently close to Earth and the stars are well enough separated that we can see the two stars individually (resolved) in a telescope and track their motion over a period of time ...
... – Sufficiently close to Earth and the stars are well enough separated that we can see the two stars individually (resolved) in a telescope and track their motion over a period of time ...
controlling light
... does not radiate equally in every direction. Nevertheless most theatrical sources, incandescent or high intensity discharge lamps, can be treated as if they were point sources but better results can be had by adjusting the reflectors that collect the light to account for the size and shape of the fi ...
... does not radiate equally in every direction. Nevertheless most theatrical sources, incandescent or high intensity discharge lamps, can be treated as if they were point sources but better results can be had by adjusting the reflectors that collect the light to account for the size and shape of the fi ...
this file
... with respect to the optical axis of the calcite crystal. He has been recognized since that time as the founder of wave theory. Isaac Newton (1643-1727), aside from his studies of gravitation, worked on the origins of white light and color on glass plates (Interference of Light). Trained as a glass b ...
... with respect to the optical axis of the calcite crystal. He has been recognized since that time as the founder of wave theory. Isaac Newton (1643-1727), aside from his studies of gravitation, worked on the origins of white light and color on glass plates (Interference of Light). Trained as a glass b ...
Geometrical Optics / Mirror and Lenses
... drop at A, is reflected at the back of the drop at B and leaves the drop at C. In the process the sunlight is broken into a spectrum just like it is in a triangular glass prism ...
... drop at A, is reflected at the back of the drop at B and leaves the drop at C. In the process the sunlight is broken into a spectrum just like it is in a triangular glass prism ...
3 The lives of galaxies
... Dead stars leave behind compact remnants - white dwarfs, neutrons stars, and black holes. We know such objects exist in the disk of the Milky Way. Perhaps the halo of our Galaxy has large numbers of them ? Such hypothetical objects are known as “Massive Compact Halo Objects” or MACHOs. They might be ...
... Dead stars leave behind compact remnants - white dwarfs, neutrons stars, and black holes. We know such objects exist in the disk of the Milky Way. Perhaps the halo of our Galaxy has large numbers of them ? Such hypothetical objects are known as “Massive Compact Halo Objects” or MACHOs. They might be ...
Searching for Planets During Predicted Mesolensing Events: II
... uncertainty limits. If the probability is high that the closest approach will lie within θE of the lens, and that the source star will be observable near the time of closest approach, then monitoring the source star during the lensing event can measure the mass of the lens, determine if it has a pla ...
... uncertainty limits. If the probability is high that the closest approach will lie within θE of the lens, and that the source star will be observable near the time of closest approach, then monitoring the source star during the lensing event can measure the mass of the lens, determine if it has a pla ...
04_Optical and medical equipment
... closer to the mirror. The image formed by a large spherical mirror will be a disk, not a point. This is known as spherical aberration. Parabolic mirrors don’t have spherical aberration. They are used to focus rays from stars in a telescope. They can also be used in flashlights and headlights since a ...
... closer to the mirror. The image formed by a large spherical mirror will be a disk, not a point. This is known as spherical aberration. Parabolic mirrors don’t have spherical aberration. They are used to focus rays from stars in a telescope. They can also be used in flashlights and headlights since a ...
CHAPTER – 10 LIGHT : REFLECTION AND REFRACTION
... gets bent. This bending of light is called refraction of light. When light travels from a rarer medium to a denser medium, it bends towards the normal. When light travels from a denser medium to a rarer medium, it bends away from the normal. ...
... gets bent. This bending of light is called refraction of light. When light travels from a rarer medium to a denser medium, it bends towards the normal. When light travels from a denser medium to a rarer medium, it bends away from the normal. ...
17.1 Reflection and Refraction
... with the light blue lens, and the bottom half will be reserved for the dark blue lens. 2. Place the laser on the edge of the laminated graph sheet and shine the laser so it follows a horizontal grid line across the paper. 3. Place the light blue lens 10 cm to the right of the laser with the slot fac ...
... with the light blue lens, and the bottom half will be reserved for the dark blue lens. 2. Place the laser on the edge of the laminated graph sheet and shine the laser so it follows a horizontal grid line across the paper. 3. Place the light blue lens 10 cm to the right of the laser with the slot fac ...
CHAPTER – 10 LIGHT : REFLECTION AND REFRACTION
... ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects. iii) Light travels in straight line. iv) The common phenomena of light are formation of shadows, formation of images by mirrors and lenses, bending of light by a medium, twin ...
... ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects. iii) Light travels in straight line. iv) The common phenomena of light are formation of shadows, formation of images by mirrors and lenses, bending of light by a medium, twin ...
Basic Optics Experiments 1 Introduction
... The most important parameter describing a lens is the focal length, which is the distance beyond the lens where incident parallel rays will focus to a point. (If the focal length is negative, it indicates that the lens causes the rays to diverge; they will appear to emanate from a point ”upstream” o ...
... The most important parameter describing a lens is the focal length, which is the distance beyond the lens where incident parallel rays will focus to a point. (If the focal length is negative, it indicates that the lens causes the rays to diverge; they will appear to emanate from a point ”upstream” o ...
Unit 19 Lab - TTU Physics
... a lens were placed near a point source, not all the light from the point source would go through lens and the light rays that do would enter the lens at different angles. It is useful to consider a source of light with all of the light rays leaving the source in the same direction. A light box is a ...
... a lens were placed near a point source, not all the light from the point source would go through lens and the light rays that do would enter the lens at different angles. It is useful to consider a source of light with all of the light rays leaving the source in the same direction. A light box is a ...
LIGHT : REFLECTION AND REFRACTION
... ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects. iii) Light travels in straight line. iv) The common phenomena of light are formation of shadows, formation of images by mirrors and lenses, bending of light by a medium, twin ...
... ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects. iii) Light travels in straight line. iv) The common phenomena of light are formation of shadows, formation of images by mirrors and lenses, bending of light by a medium, twin ...
Here`s
... is not in the form of stars and planets that we see. Observations show that there is far too little visible matter in the Universe to make up the 27% required by the observations. Second, it is not in the form of dark clouds of normal matter, matter made up of particles called baryons. We know this ...
... is not in the form of stars and planets that we see. Observations show that there is far too little visible matter in the Universe to make up the 27% required by the observations. Second, it is not in the form of dark clouds of normal matter, matter made up of particles called baryons. We know this ...
Detecting g-ray Sources - Pennsylvania State University
... Point Source Search - Weighted Analysis Optimal Bin Size for Point Sources: • If Guassian Point Spread Function, then Radius of Bin is 1.6 x of the Gaussian Point Spread Function ...
... Point Source Search - Weighted Analysis Optimal Bin Size for Point Sources: • If Guassian Point Spread Function, then Radius of Bin is 1.6 x of the Gaussian Point Spread Function ...
in the Universe
... MACHO in our galaxy's halo passes very close to line of sight from Earth to a distant star, the gravity of the otherwise invisible MACHO acts as a lens that bends the starlight –star splits into multiple images that are separated by a milliarcsecond, far too small to observe from the ground –backgro ...
... MACHO in our galaxy's halo passes very close to line of sight from Earth to a distant star, the gravity of the otherwise invisible MACHO acts as a lens that bends the starlight –star splits into multiple images that are separated by a milliarcsecond, far too small to observe from the ground –backgro ...
Interacting binary stars Properties of some binary stars are
... has too much angular momentum to fall directly onto the surface of the other star: Gas forms an accretion disk around the mass gaining star, through which the gas slowly spirals in before being accreted. This occurs if the accreting star does not have a strong magnetic field. ...
... has too much angular momentum to fall directly onto the surface of the other star: Gas forms an accretion disk around the mass gaining star, through which the gas slowly spirals in before being accreted. This occurs if the accreting star does not have a strong magnetic field. ...
1818 ACC Chemistry
... A camera has an aperture of 1.33 mm. What is the minimum separation of two flashlights at a distance of 2.00 km that this camera can record as two lights rather than one light. (Assume a wavelength of 550 nm as an average for white light.) ...
... A camera has an aperture of 1.33 mm. What is the minimum separation of two flashlights at a distance of 2.00 km that this camera can record as two lights rather than one light. (Assume a wavelength of 550 nm as an average for white light.) ...
WFIRSTSurveyScience
... 1992 (Jewitt & Luu 1993). In the Kuiper Belt, planet formation never reached completion and as a result it contains some of the least processed bodies in our Solar system. Its dynamical and physical properties illuminate the conditions during the early stages of planet formation and have already led ...
... 1992 (Jewitt & Luu 1993). In the Kuiper Belt, planet formation never reached completion and as a result it contains some of the least processed bodies in our Solar system. Its dynamical and physical properties illuminate the conditions during the early stages of planet formation and have already led ...
Chapter 9 Parallax and Distance to Stars
... distance of 1 AU. The angle p will be small (measured in arcseconds) and is 21 of the total observed angular displacement. Astronomers adopted a new unit of distance, the parsec, to measure stellar distances. If d is in parsecs, then the following equation applies: d= ...
... distance of 1 AU. The angle p will be small (measured in arcseconds) and is 21 of the total observed angular displacement. Astronomers adopted a new unit of distance, the parsec, to measure stellar distances. If d is in parsecs, then the following equation applies: d= ...
Gravitationally Lensed Galaxy
... behaved exactly as Einstein predicted; the Sun’s gravity bent their light, causing an apparent shift in their positions. In 1937, astronomer Fritz Zwicky applied Einstein’s theory on a larger scale. He predicted that a massive foreground object could sufficiently warp the space around itself to act ...
... behaved exactly as Einstein predicted; the Sun’s gravity bent their light, causing an apparent shift in their positions. In 1937, astronomer Fritz Zwicky applied Einstein’s theory on a larger scale. He predicted that a massive foreground object could sufficiently warp the space around itself to act ...
Optimising Optical Transparency
... © Essilor International - Varilux® University Figure 6 Double images, caused by internal reflection within the lens ...
... © Essilor International - Varilux® University Figure 6 Double images, caused by internal reflection within the lens ...
Use of Spherical Mirrors - unit-1
... (air), the refracted ray bends away from the normal and the angle of refraction is greater than the angle of incidence. It is clear from Fig that as the angle of incidence (î) increases, the angle of refraction (ř) is always greater than (î), till for a particular value of angel of incidence, the co ...
... (air), the refracted ray bends away from the normal and the angle of refraction is greater than the angle of incidence. It is clear from Fig that as the angle of incidence (î) increases, the angle of refraction (ř) is always greater than (î), till for a particular value of angel of incidence, the co ...
NATURE OF VISIBLE LIGHT: Our current knowledge is that light
... curvature of the spherical surfaces that bound the lens on the front and the back. For example, a double convex lens with n = 1.5, R1 = 20 cm and R2 = -10 cm ( explaining the sign conventions involved is beyond our interests ) will have f = 13.3 cm. Image formation by a thin lens: The formation of t ...
... curvature of the spherical surfaces that bound the lens on the front and the back. For example, a double convex lens with n = 1.5, R1 = 20 cm and R2 = -10 cm ( explaining the sign conventions involved is beyond our interests ) will have f = 13.3 cm. Image formation by a thin lens: The formation of t ...
Conceptual Physics - Southwest High School
... Diverging lens create virtual images since the refracted rays do not actually converge to a point. In the case of a diverging lens, the image location is located on the object's side of the lens where the refracted rays would intersect if extended backwards. Every observer would be sighting along a ...
... Diverging lens create virtual images since the refracted rays do not actually converge to a point. In the case of a diverging lens, the image location is located on the object's side of the lens where the refracted rays would intersect if extended backwards. Every observer would be sighting along a ...
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.