Astronomers observe a galaxy emitting light at 9,427 Å. From lab experiments on Earth, astronomers determine...
Astronomers observe a galaxy emitting light at 9,427 Å. From lab experiments on Earth, astronomers determine the expected, or rest-frame, wavelength to be 6364 Å.
What is the redshift for this galaxy? State your answer to 4 significant figures.
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Astronomers observe a galaxy emitting light at 9,427 Å. From lab
experiments on Earth, astronomers determine...
Astronomers determine that a nearby galaxy is moving toward our galaxy at a speed of 723.0...
Astronomers determine that a nearby galaxy is moving toward our galaxy at a speed of 723.0 km/s with respect to the Earth. If Earth receives a wavelength λ = 679.1 nm from a particular star in this nearby galaxy, what was the wavelength emitted by the star? (Give your answer to at least three significant figures.)
11. Astronomers observing a distant galaxy detect light from the Lyman a transition (n = 2 → n = 1 in hydrogen) at a fr...
11. Astronomers observing a distant galaxy detect light from the Lyman a transition (n = 2 → n = 1 in hydrogen) at a frequency of 2.25 x 1015 Hz. Estimate how far away the galaxy is. (You may take the Hubble constant to be 70kms- Mpc) A supernova causes a sudden brightening of the galaxy, which lasts for forty days as seen from Earth. How long did it last in the rest-frame of the galaxy?
11. Astronomers observing a...
A distant galaxy emits light that has a wavelength of 702.8 nm. On earth, the wavelength...
A distant galaxy emits light that has a wavelength of 702.8 nm. On earth, the wavelength of this light is measured to be 704.2 nm. (a) Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give your answer to 4 significant digits. Use 2.998 x 108 m/s as the speed of light.) (a) The galaxy is receding from the earth. (b) Number _______ Units m/s
38. Astronomers studying the light from calcium atoms located in a galaxy in the constellation Bootes...
38. Astronomers studying the light from calcium atoms located in a galaxy in the constellation Bootes find that the spectral lines are shifted toward the red end of the spectrum The redshift indicates that the galaxy is moving away at a speed of 3.9 x 106 ms. What is the distance (in light - years) to the galaxy? A) 4.7 x 10° light-years B) 23 x 10$ light-years C) 1.1 x 10 light years D) 8.4 x 106 light-years E)...
Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54×107 light-years from Earth. If the...
Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54×107 light-years from Earth. If the lifetime of a human is taken to be 75.0 years, a spaceship would need to achieve some minimum speed ?min to deliver a living human being to this galaxy. How close to the speed of light would this minimum speed be? Express your answer as the difference between ?min and the speed of light ?. ?−?min= __________ m/s
Some observations reported on an astronomical object (quasar 3C-9) suggest that, when it emitted the light...
Some observations reported on an astronomical object (quasar 3C-9) suggest that, when it emitted the light that has just reached the earth, it was moving away from the earth at a speed of about (4/5),c (a) One of the lines identified in its spectrum has a wavelength of about 1200 A when emitted from a stationary source. At what wavelength must this line have appeared on the observed spectrum of the quasar? (Note: 1 Å= 10-10 m and c =...
Quasars are faint, distant sources of radio waves. (Quasar is short for "quasi-stellar source." They are...
Quasars are faint, distant sources of radio waves. (Quasar is short for "quasi-stellar source." They are so named because, like a star, they appear to the astronomer to be pointlike.) From the shift in the frequency of their emitted light toward the red, called the "redshift," we know that quasars are moving very fast. Astronomers observe that the more distant an object is from the earth, the faster it moves. In this way they determine that quasars are billions of...
A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the...
A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 2.20 × 106 m/s. Relative to the center, the tangential speed is vT = 0.550 × 106 m/s for locations A and B, which are equidistant from the center. When the frequencies of the light coming from regions A and B are measured on earth, they are not the same...
In a physics lab, light with a wavelength of 560 nm travels in air from a...
In a physics lab, light with a wavelength of 560 nm travels in air from a laser to a photocell in a time of 17.2 ns . When a slab of glass with a thickness of 0.880 m is placed in the light beam, with the beam incident along the normal to the parallel faces of the slab, it takes the light a time of 21.0 ns to travel from the laser to the photocell. What is the wavelength of...
Infrared radiation from young stars can pass through the heavy dust douds surrounding them, allowing astronomers...
Infrared radiation from young stars can pass through the heavy dust douds surrounding them, allowing astronomers here on Earth to study the earliest stages of star formation, before a star begins to emit visible light. Suppose an infrared telescope is tuned to detect infrared radiation with a frequency of 26.6THz. Calculate the wavelength of the infrared radiation. Round your answer to 3 significant digits.
11. Astronomers observing a distant galaxy detect light from the Lyman a transition (n = 2 → n = 1 in hydrogen) at a frequency of 2.25 x 1015 Hz. Estimate how far away the galaxy is. (You may take the Hubble constant to be 70kms- Mpc) A supernova causes a sudden brightening of the galaxy, which lasts for forty days as seen from Earth. How long did it last in the rest-frame of the galaxy?
11. Astronomers observing a...
38. Astronomers studying the light from calcium atoms located in a galaxy in the constellation Bootes find that the spectral lines are shifted toward the red end of the spectrum The redshift indicates that the galaxy is moving away at a speed of 3.9 x 106 ms. What is the distance (in light - years) to the galaxy? A) 4.7 x 10° light-years B) 23 x 10$ light-years C) 1.1 x 10 light years D) 8.4 x 106 light-years E)...
Some observations reported on an astronomical object (quasar 3C-9) suggest that, when it emitted the light that has just reached the earth, it was moving away from the earth at a speed of about (4/5),c (a) One of the lines identified in its spectrum has a wavelength of about 1200 A when emitted from a stationary source. At what wavelength must this line have appeared on the observed spectrum of the quasar? (Note: 1 Å= 10-10 m and c =...
Quasars are faint, distant sources of radio waves. (Quasar is short for "quasi-stellar source." They are so named because, like a star, they appear to the astronomer to be pointlike.) From the shift in the frequency of their emitted light toward the red, called the "redshift," we know that quasars are moving very fast. Astronomers observe that the more distant an object is from the earth, the faster it moves. In this way they determine that quasars are billions of...
Infrared radiation from young stars can pass through the heavy dust douds surrounding them, allowing astronomers here on Earth to study the earliest stages of star formation, before a star begins to emit visible light. Suppose an infrared telescope is tuned to detect infrared radiation with a frequency of 26.6THz. Calculate the wavelength of the infrared radiation. Round your answer to 3 significant digits.
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