Atomic Spectroscopy
... light, heat or collision with another particle (electron, atom, ion or molecule), one or more changes may occur. The energy absorbed may simply increase the kinetic energy of the atom or alternatively, the atom may absorb the energy and become excited. The permitted energy levels are finite and well ...
... light, heat or collision with another particle (electron, atom, ion or molecule), one or more changes may occur. The energy absorbed may simply increase the kinetic energy of the atom or alternatively, the atom may absorb the energy and become excited. The permitted energy levels are finite and well ...
this release note
... because the ’true’ redshifts at faint mags are mostly from COSMOS 30-band photo-z’s and they are not reliable for very faint objects. 2. We assume that the high accuracy photo-z’s based on the 30-band photometry, which comprise a large fraction of our sample, are the truth table and we compare our 5 ...
... because the ’true’ redshifts at faint mags are mostly from COSMOS 30-band photo-z’s and they are not reliable for very faint objects. 2. We assume that the high accuracy photo-z’s based on the 30-band photometry, which comprise a large fraction of our sample, are the truth table and we compare our 5 ...
a collection of problems about light rays, refraction and rainbows
... “dispersion”. Thus different wavelengths of light have different angles χm where they are brightest, and rainbows get their colour. (i) Estimate the angular width of a rainbow. (ii) Why is a rainbow darkest just outside the blue band? (b) We have considered a drop in the sky at an angle χm to the di ...
... “dispersion”. Thus different wavelengths of light have different angles χm where they are brightest, and rainbows get their colour. (i) Estimate the angular width of a rainbow. (ii) Why is a rainbow darkest just outside the blue band? (b) We have considered a drop in the sky at an angle χm to the di ...
Spectral Response of Silicon Image Sensors
... wavelength, intensity and the variation of this intensity over time. This translates in the particle domain to the amount of particles crossing an imaginary surface per unit of time. Particles interact with each other by exchanging particles or energy. A photon interacts with other particles by tran ...
... wavelength, intensity and the variation of this intensity over time. This translates in the particle domain to the amount of particles crossing an imaginary surface per unit of time. Particles interact with each other by exchanging particles or energy. A photon interacts with other particles by tran ...
Physical properties of the HAT-P-23 and WASP
... leading to a resolution of 0.32 pixel−1 . The telescope was autoguided and defocussed for all science observations. This observing mode consists of using the telescope out of focus to spread the light of the stars in the FOV on many more pixels of the CCD than normal in-focus observations. In this ...
... leading to a resolution of 0.32 pixel−1 . The telescope was autoguided and defocussed for all science observations. This observing mode consists of using the telescope out of focus to spread the light of the stars in the FOV on many more pixels of the CCD than normal in-focus observations. In this ...
Subject: Precision Optics II Grade: 10
... 1. EM spectrum inventory. [What is light?] 2. Snell’s Law & reflection experiment with rectangular prisms. [How does light interact with matter] 3. Snell’s Law experiment and light through concave and convex prisms. [How does light interact with matter?] 4. Illustrated Essay #1: What happens when li ...
... 1. EM spectrum inventory. [What is light?] 2. Snell’s Law & reflection experiment with rectangular prisms. [How does light interact with matter] 3. Snell’s Law experiment and light through concave and convex prisms. [How does light interact with matter?] 4. Illustrated Essay #1: What happens when li ...
Planet
... Exoplanets around massive stars Difficult with the Doppler method because more massive stars have higher effective temperatures and thus few spectral lines. Plus they have high rotation rates. Result: few planets around early-type, more massive stars, and these around F-type stars (~ 1.4 solar mass ...
... Exoplanets around massive stars Difficult with the Doppler method because more massive stars have higher effective temperatures and thus few spectral lines. Plus they have high rotation rates. Result: few planets around early-type, more massive stars, and these around F-type stars (~ 1.4 solar mass ...
A Comparison of CCD Images Taken with Different Cameras Abstract
... Figures 5–6 have been reduced from their original raw form. Noise sources have been reduced or eliminated. For more information about CCD noise sources, see the paper by B. Teasdel which discusses cosmic rays, bias frames, dark counts and flat field corrections. The IRAF software package was used fo ...
... Figures 5–6 have been reduced from their original raw form. Noise sources have been reduced or eliminated. For more information about CCD noise sources, see the paper by B. Teasdel which discusses cosmic rays, bias frames, dark counts and flat field corrections. The IRAF software package was used fo ...
Photochemical Conversion of Solar Energy
... UV-C (100-280 nm) is almost completely absorbed in air within a few hundred meters. When UV-C photons collide with oxygen atoms, the energy exchange causes the formation of ozone. UV-C is never observed in nature, however, since it is absorbed so quickly. Germicidal UV-C lamps are often used to puri ...
... UV-C (100-280 nm) is almost completely absorbed in air within a few hundred meters. When UV-C photons collide with oxygen atoms, the energy exchange causes the formation of ozone. UV-C is never observed in nature, however, since it is absorbed so quickly. Germicidal UV-C lamps are often used to puri ...
setting up of a total internal reflection fluorescent microscope
... background noise [1]. TIRF utilizes the evanescent field created when a beam of light strikes an interface between two media to excite fluorescent dyes in the specimen. The phenomenon of total internal reflection occurs in which light is reflected but not refracted from a medium boundary and provide ...
... background noise [1]. TIRF utilizes the evanescent field created when a beam of light strikes an interface between two media to excite fluorescent dyes in the specimen. The phenomenon of total internal reflection occurs in which light is reflected but not refracted from a medium boundary and provide ...
Preview Sample 2
... Most of the atoms in our bodies (all the elements except for hydrogen, since our bodies generally do not contain helium) were made by stars well after the Big Bang. So most of what makes up our bodies was once part of stars. Light travels at 300,000 kilometers per second. A light-year is the distanc ...
... Most of the atoms in our bodies (all the elements except for hydrogen, since our bodies generally do not contain helium) were made by stars well after the Big Bang. So most of what makes up our bodies was once part of stars. Light travels at 300,000 kilometers per second. A light-year is the distanc ...
black hole masses and host galaxy evolution of radio
... aperture radii for 13 AGN host galaxies are summarized in Table 2. 2.3. New Redshift Measurements We measured the redshift for all observed host galaxies, which include 13 new objects in addition to the 15 reported in Woo et al. (2004). Radial velocity template stars were used to fit overall spectra ...
... aperture radii for 13 AGN host galaxies are summarized in Table 2. 2.3. New Redshift Measurements We measured the redshift for all observed host galaxies, which include 13 new objects in addition to the 15 reported in Woo et al. (2004). Radial velocity template stars were used to fit overall spectra ...
Turbulent Flow-Driven Molecular Cloud Formation: A Solution to the
... of the stellar population ages, it is worth reviewing the situation in some detail, especially given some of the conflicting literature on the subject. We focus on the Taurus-Auriga molecular cloud complex, where the most detailed observational efforts have been made. To illustrate the problem, Figu ...
... of the stellar population ages, it is worth reviewing the situation in some detail, especially given some of the conflicting literature on the subject. We focus on the Taurus-Auriga molecular cloud complex, where the most detailed observational efforts have been made. To illustrate the problem, Figu ...
Ch 20 Stellar Evolution
... most massive stars have the strongest winds; O- and Btype stars can lose a tenth of their total mass this way in only a million years. These stellar winds hollow out cavities in the interstellar medium surrounding giant stars. ...
... most massive stars have the strongest winds; O- and Btype stars can lose a tenth of their total mass this way in only a million years. These stellar winds hollow out cavities in the interstellar medium surrounding giant stars. ...
The VLSR Correction - Johns Hopkins University
... observer’s motion in order to get the source motion. In astronomers’ language, the source has two types of motion: “proper” motion, which is transverse to the line of sight and “radial” motion, which is along the line of sight. In Junior Lab, we can measure only the radial motion. The question that ...
... observer’s motion in order to get the source motion. In astronomers’ language, the source has two types of motion: “proper” motion, which is transverse to the line of sight and “radial” motion, which is along the line of sight. In Junior Lab, we can measure only the radial motion. The question that ...
Chapter 2
... Def: excess loss: the loss of the device above the fundamental loss introduced by the coupling ratio α Example: A 3dB coupler may have 0.2dB excess loss ...
... Def: excess loss: the loss of the device above the fundamental loss introduced by the coupling ratio α Example: A 3dB coupler may have 0.2dB excess loss ...
Many other important inventions involve the use of
... some work in the infrared and ultraviolet). Optical telescopes increase the apparent angular size of distant objects as well as their apparentbrightness. In order for the image to be observed, photographed, ...
... some work in the infrared and ultraviolet). Optical telescopes increase the apparent angular size of distant objects as well as their apparentbrightness. In order for the image to be observed, photographed, ...
Photonic Crystal Nanocavities for Efficient Light Confinement and
... structure, in which the resonators are coupled together through the photonic crystal. One of the key challenges of using such multi-resonator structures lies in fabricating the individual resonators with sufficient accuracy to allow spectral alignment and mode-matching of light from one cavity to an ...
... structure, in which the resonators are coupled together through the photonic crystal. One of the key challenges of using such multi-resonator structures lies in fabricating the individual resonators with sufficient accuracy to allow spectral alignment and mode-matching of light from one cavity to an ...
The discovery based on GLIMPSE data of a protostar driving a
... these also show similar bipolar morphologies in the infrared (Balick et al. 1987; Kwok 1993). Recombination and forbidden line emission from hydrogen and metals, especially Hα and [Oiii], are significant spectral features of a PN in the optical (Osterbrock 1964; Miller 1974). However, very weak Hα a ...
... these also show similar bipolar morphologies in the infrared (Balick et al. 1987; Kwok 1993). Recombination and forbidden line emission from hydrogen and metals, especially Hα and [Oiii], are significant spectral features of a PN in the optical (Osterbrock 1964; Miller 1974). However, very weak Hα a ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.