ap physics b
... • Frequency: The number of waves per unit time. The symbol for frequency is “f” unless it is electromagnetic frequency. In that case, it is the Greek letter, nu, which looks like ν or c. Frequency is measured in hertz (Hz) or 1/second. It is sometimes seen as s-1 which is equivalent to 1/second. • A ...
... • Frequency: The number of waves per unit time. The symbol for frequency is “f” unless it is electromagnetic frequency. In that case, it is the Greek letter, nu, which looks like ν or c. Frequency is measured in hertz (Hz) or 1/second. It is sometimes seen as s-1 which is equivalent to 1/second. • A ...
Ch. 23
... Cosmic Helium Abundance • In the Era of Nucleosynthesis, i.e. the first three minutes • number of protons & neutrons roughly equal as long as T > 1011 K • below 1011 K, proton-to-neutron reactions no longer occur • neutrons still decay into protons ...
... Cosmic Helium Abundance • In the Era of Nucleosynthesis, i.e. the first three minutes • number of protons & neutrons roughly equal as long as T > 1011 K • below 1011 K, proton-to-neutron reactions no longer occur • neutrons still decay into protons ...
Distance determination for RAVE stars using stellar models
... spirals, and finally dwarf galaxies. The power spectrum is used to measure the power of density perturbations on a certain scale. The current cosmological model predicts a HarrisonZel’dovich spectrum (P (k) ∝ k, where k is the wavenumber). This power spectrum predicts more power on small scale, so t ...
... spirals, and finally dwarf galaxies. The power spectrum is used to measure the power of density perturbations on a certain scale. The current cosmological model predicts a HarrisonZel’dovich spectrum (P (k) ∝ k, where k is the wavenumber). This power spectrum predicts more power on small scale, so t ...
here - The University of Sydney
... The constellations of the Zodiac reside on along the ecliptic. While not commonly referred to in the Astronomy catalogue but rather than in Astrology; and as such an Astrologer will define your Zodiac constellation when the Sun is in a particular constellation (viewed from the Earth) when you are bo ...
... The constellations of the Zodiac reside on along the ecliptic. While not commonly referred to in the Astronomy catalogue but rather than in Astrology; and as such an Astrologer will define your Zodiac constellation when the Sun is in a particular constellation (viewed from the Earth) when you are bo ...
A simple method for Bragg diffraction in volume holographic gratings Heifetz,
... physics. Holographic data storage and optical information processing systems based on volume gratings are currently under development.1–5 Other applications include polarization optics,6–8 beam splitters and combiners,9,10 narrowband spectral filters for optical communications,11–13 and intracavity ...
... physics. Holographic data storage and optical information processing systems based on volume gratings are currently under development.1–5 Other applications include polarization optics,6–8 beam splitters and combiners,9,10 narrowband spectral filters for optical communications,11–13 and intracavity ...
BD−21 3873: another yellow-symbiotic barium star
... in AG Dra, which is not surprising in view of the larger temperature of the ionizing source in AG Dra (170 000 K) compared to BD−21◦ 3873 (75 000 K; Schmid & Nussbaumer 1993). Alternatively, orbital modulation may be responsible for the fact that the spectral features triggered by the ionizing sourc ...
... in AG Dra, which is not surprising in view of the larger temperature of the ionizing source in AG Dra (170 000 K) compared to BD−21◦ 3873 (75 000 K; Schmid & Nussbaumer 1993). Alternatively, orbital modulation may be responsible for the fact that the spectral features triggered by the ionizing sourc ...
Fig. 35-2
... Interference The concept of optical interference is critical to understanding many natural phenomena, ranging from color shifting in butterfly wings to intensity patterns formed by small apertures. These phenomena cannot be explained using simple geometrical optics, and are based on the wave nature ...
... Interference The concept of optical interference is critical to understanding many natural phenomena, ranging from color shifting in butterfly wings to intensity patterns formed by small apertures. These phenomena cannot be explained using simple geometrical optics, and are based on the wave nature ...
The Origin of Life from Primordial Planets
... of planets throughout the primordial planet clumps along with stardust fertilizer, water, carbon and life infections and organic waste products of other planets. According to HGD, life is common in the cosmos and has existed throughout all space at galaxy and galaxy cluster scales since soon after t ...
... of planets throughout the primordial planet clumps along with stardust fertilizer, water, carbon and life infections and organic waste products of other planets. According to HGD, life is common in the cosmos and has existed throughout all space at galaxy and galaxy cluster scales since soon after t ...
SN Ia host galaxy properties and the dust extinction
... SN Ia are the mainstay of cosmological distance measurements. The photometric properties of their light curves are very stable but appear to depend slightly on host galaxy properties (e.g. star formation rate or stellar mass). With this mind, the third incarnation of the Sloan Digital Sky Survey (SD ...
... SN Ia are the mainstay of cosmological distance measurements. The photometric properties of their light curves are very stable but appear to depend slightly on host galaxy properties (e.g. star formation rate or stellar mass). With this mind, the third incarnation of the Sloan Digital Sky Survey (SD ...
Folie 1
... one of the defining candidates of T-Tauri stars present on all time scales short time, mostly small changes: rotation ocultations from disk ‘flickering’ long time, larger amplitudes: EX Lup (EXor) FU Ori (FUor) duration for FUor unclear, frequency 5-50kyr from infrared ...
... one of the defining candidates of T-Tauri stars present on all time scales short time, mostly small changes: rotation ocultations from disk ‘flickering’ long time, larger amplitudes: EX Lup (EXor) FU Ori (FUor) duration for FUor unclear, frequency 5-50kyr from infrared ...
Extraordinary optical transmission through subwavelength holes Dye-Zone A. Chen
... Finite-difference time-domain simulations also predict the enhancement and correlate well with the experimental data. Both experimental and theoretical results show a fivefold increase in transmission through a perforated film versus a solid film. © 2007 American Institute of Physics. 关DOI: 10.1063/ ...
... Finite-difference time-domain simulations also predict the enhancement and correlate well with the experimental data. Both experimental and theoretical results show a fivefold increase in transmission through a perforated film versus a solid film. © 2007 American Institute of Physics. 关DOI: 10.1063/ ...
Oscillation Modes of Strange Quark Stars with a Strangelet Crust
... Next we compute the f and p modes for a homogeneous quark star having an EOS defined as in Eq. 1, and study their dependence on the stellar mass. The mass of the strange quark, the value of the critical quark chemical potential, and the interaction parameters a4 are tunable features in the equation ...
... Next we compute the f and p modes for a homogeneous quark star having an EOS defined as in Eq. 1, and study their dependence on the stellar mass. The mass of the strange quark, the value of the critical quark chemical potential, and the interaction parameters a4 are tunable features in the equation ...
Light Polariser
... You probably already know that light is said to be a form of wave energy, but to understand polarisation you need to know a little bit about the kind of wave that physicists have in mind when they say this. As with any form of energy, light can be produced in one place and have an effect in another ...
... You probably already know that light is said to be a form of wave energy, but to understand polarisation you need to know a little bit about the kind of wave that physicists have in mind when they say this. As with any form of energy, light can be produced in one place and have an effect in another ...
jan26 - atmo.arizona.edu
... Once the cloud had formed we shined the laser beam through the flask. Laser light wasn't visible to the left or the right of the flask, only in the flask where smog droplets were present and scattering laser light. The smog droplets (and they may well be solid particles, I don't know) are very smal ...
... Once the cloud had formed we shined the laser beam through the flask. Laser light wasn't visible to the left or the right of the flask, only in the flask where smog droplets were present and scattering laser light. The smog droplets (and they may well be solid particles, I don't know) are very smal ...
SKA and VLBI synergies
... VLBI observations have remarkably strong impact in the Stellar physics studies. We can mention the study of Gamma Ray Bursts (GRBs), Radio Supernovae (RSNe) and Supernova Remnants (SNRs), Microquasars or Pulsars, among others. Moreover, VLBI astrometry is a unique tool providing stellar parallax mea ...
... VLBI observations have remarkably strong impact in the Stellar physics studies. We can mention the study of Gamma Ray Bursts (GRBs), Radio Supernovae (RSNe) and Supernova Remnants (SNRs), Microquasars or Pulsars, among others. Moreover, VLBI astrometry is a unique tool providing stellar parallax mea ...
Life Cycle of a Star Lesson Plan
... A white dwarf is very hot when it is formed, but since it has no source of energy, it will gradually radiate away its energy and cool down. This means that its radiation, which initially has a high color temperature, will lessen and redden with time. Over a very long time, a white dwarf will cool to ...
... A white dwarf is very hot when it is formed, but since it has no source of energy, it will gradually radiate away its energy and cool down. This means that its radiation, which initially has a high color temperature, will lessen and redden with time. Over a very long time, a white dwarf will cool to ...
12C13C1414N21312C/13C3he43He/4He Sub-surface
... (see below). Here, we will discuss which observed features in hot stars might be produced by these near surface convection zones. In particular, we examine whether a link exists between these convective regions and observable small scale velocity fields at the stellar surface and in the stellar wind ...
... (see below). Here, we will discuss which observed features in hot stars might be produced by these near surface convection zones. In particular, we examine whether a link exists between these convective regions and observable small scale velocity fields at the stellar surface and in the stellar wind ...
Get PDF - OSA Publishing
... of the core of a standard telecom fiber. For the inscription a femtosecond laser system (HighQ Laser Femtoregen IC335) emitting 300 fs pulses at 1035 nm and operating at a repetition rate of 1 kHz was used while the light was focused with a Mitutoyo, long working distance microscope objective ( × 50 ...
... of the core of a standard telecom fiber. For the inscription a femtosecond laser system (HighQ Laser Femtoregen IC335) emitting 300 fs pulses at 1035 nm and operating at a repetition rate of 1 kHz was used while the light was focused with a Mitutoyo, long working distance microscope objective ( × 50 ...
Lab Manual part 1
... 3. Determine the focal length of your eyepiece (small lens) the same way. Note that because the eyepiece is much smaller than the objective, it gathers much less light and the image will be much fainter. Also the focal length of the eyepiece is quite small, so the focal point will be quite close to ...
... 3. Determine the focal length of your eyepiece (small lens) the same way. Note that because the eyepiece is much smaller than the objective, it gathers much less light and the image will be much fainter. Also the focal length of the eyepiece is quite small, so the focal point will be quite close to ...
Detection Sensitivity of Single-Molecule Optical Absorption at Room
... process from the vibronic states prepared by the optical excitation to the lowest vibrational level in the ground electronic state. hv is the photon energy, σ is the absorption crosssection for a single chromophore (∼ 10-16 cm2 at room temperature), and S is the beam waist area (∼10-9 cm2). The rela ...
... process from the vibronic states prepared by the optical excitation to the lowest vibrational level in the ground electronic state. hv is the photon energy, σ is the absorption crosssection for a single chromophore (∼ 10-16 cm2 at room temperature), and S is the beam waist area (∼10-9 cm2). The rela ...
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.