Take time to understand it now
... • Come to a consensus answer you both agree on. • If you get stuck or are not sure of your answer, ask ...
... • Come to a consensus answer you both agree on. • If you get stuck or are not sure of your answer, ask ...
ISP 205 Review Questions, Week 13
... than the Sun? Refer to Fig. 15.12 in the textbook. It is about 3000 times more luminous than the Sun. Once you know the star’s luminosity L, you can calculate its distance r from the measured apparent brightness (or flux) F, using the equations L F 4r 2 L r 4F ...
... than the Sun? Refer to Fig. 15.12 in the textbook. It is about 3000 times more luminous than the Sun. Once you know the star’s luminosity L, you can calculate its distance r from the measured apparent brightness (or flux) F, using the equations L F 4r 2 L r 4F ...
Week 2 (9/27) – Opinion Poll I am taking this class because:
... C. Most of the matter in the Universe is non-luminous and is referred to as Dark Matter D. The nearest star to the Sun is about 4 light years away E. For many stars in our galaxy, astronomers have measured the “wobble” induced by the gravity of the orbiting planet ...
... C. Most of the matter in the Universe is non-luminous and is referred to as Dark Matter D. The nearest star to the Sun is about 4 light years away E. For many stars in our galaxy, astronomers have measured the “wobble” induced by the gravity of the orbiting planet ...
Origin and Formation of the Universe – PowerPoint notes
... 2. This redness is the result of light being ______________________ as objects in the universe move _____________ from each other (the result of the big bang). ...
... 2. This redness is the result of light being ______________________ as objects in the universe move _____________ from each other (the result of the big bang). ...
here
... (d) Both (b) and (c). 2. Astronomers use the fact that atoms have quantized energy levels to: (a) Determine the elemental abundances of stars and other astrophysical bodies. (b) Measure the mass of stars and other astrophysical bodies. (c) Try to understand chemistry. (d) Measure the relative speed ...
... (d) Both (b) and (c). 2. Astronomers use the fact that atoms have quantized energy levels to: (a) Determine the elemental abundances of stars and other astrophysical bodies. (b) Measure the mass of stars and other astrophysical bodies. (c) Try to understand chemistry. (d) Measure the relative speed ...
The Doppler Effect
... He later discovered that the light from almost all distant galaxies was red shifted. Edwin Hubble later showed that the farther away the galaxies are, the faster they seem to be receding from us. ...
... He later discovered that the light from almost all distant galaxies was red shifted. Edwin Hubble later showed that the farther away the galaxies are, the faster they seem to be receding from us. ...
Document
... position. Just like the Big Bang provided for the beginning of the universe, Hubble's observations provided for the beginning of the Big Bang theory. Since the Big Bang, the universe has been continuously expanding and, thus, there has been more and more distance between clusters of galaxies. Galaxi ...
... position. Just like the Big Bang provided for the beginning of the universe, Hubble's observations provided for the beginning of the Big Bang theory. Since the Big Bang, the universe has been continuously expanding and, thus, there has been more and more distance between clusters of galaxies. Galaxi ...
Document
... So all objects are moving away from us Are we at the center of the universe? Raisin bread model Hubble constant - rate of recession/distance The further away galaxies are, the faster they are receding – This means the universe is expanding exponentially! ...
... So all objects are moving away from us Are we at the center of the universe? Raisin bread model Hubble constant - rate of recession/distance The further away galaxies are, the faster they are receding – This means the universe is expanding exponentially! ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... outpouring of energy from quasars?" How would you respond? Since black holes have mass, they have gravity and thus they attract matter towards them. When this matter moves inside the event horizon (also known as the Schwarzschild radius), it is no longer observable. This is because even light is tra ...
... outpouring of energy from quasars?" How would you respond? Since black holes have mass, they have gravity and thus they attract matter towards them. When this matter moves inside the event horizon (also known as the Schwarzschild radius), it is no longer observable. This is because even light is tra ...
Hubblecast 70: Peering around cosmic corners Visual notes 00:00
... 8. This isn’t the only intriguing effect that gravitational lensing can produce. Take these five quasars photographed by Hubble back in 2006. They all look very similar and close together… perhaps a little too similar. In fact, these are not quasar quintuplets, but a single quasar seen five separate ...
... 8. This isn’t the only intriguing effect that gravitational lensing can produce. Take these five quasars photographed by Hubble back in 2006. They all look very similar and close together… perhaps a little too similar. In fact, these are not quasar quintuplets, but a single quasar seen five separate ...
Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum. In general, whether or not the radiation is within the visible spectrum, ""redder"" means an increase in wavelength – equivalent to a lower frequency and a lower photon energy, in accordance with, respectively, the wave and quantum theories of light.Some redshifts are an example of the Doppler effect, familiar in the change of apparent pitches of sirens and frequency of the sound waves emitted by speeding vehicles. A redshift occurs whenever a light source moves away from an observer. Another kind of redshift is cosmological redshift, which is due to the expansion of the universe, and sufficiently distant light sources (generally more than a few million light years away) show redshift corresponding to the rate of increase in their distance from Earth. Finally, gravitational redshift is a relativistic effect observed in electromagnetic radiation moving out of gravitational fields. Conversely, a decrease in wavelength is called blueshift and is generally seen when a light-emitting object moves toward an observer or when electromagnetic radiation moves into a gravitational field. However, redshift is a more common term and sometimes blueshift is referred to as negative redshift.Knowledge of redshifts and blueshifts has been applied to develop several terrestrial technologies such as Doppler radar and radar guns. Redshifts are also seen in the spectroscopic observations of astronomical objects. Its value is represented by the letter z.A special relativistic redshift formula (and its classical approximation) can be used to calculate the redshift of a nearby object when spacetime is flat. However, in many contexts, such as black holes and Big Bang cosmology, redshifts must be calculated using general relativity. Special relativistic, gravitational, and cosmological redshifts can be understood under the umbrella of frame transformation laws. There exist other physical processes that can lead to a shift in the frequency of electromagnetic radiation, including scattering and optical effects; however, the resulting changes are distinguishable from true redshift and are not generally referred to as such (see section on physical optics and radiative transfer).