How fast (as a percentage of light speed) would a star have to be moving so...
How fast (as a percentage of light speed) would a star have to be moving so that the frequency of the light we receive from it is 14.0 % higher than the frequency of the light it is emitting?
Would it be moving away from us or toward us? (Assume it is moving either directly away from us or directly toward us.)
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How fast (as a percentage of light speed) would a star have to
be moving so...
In an Earth reference frame, a star is 76 light-years away. How fast would you have...
In an Earth reference frame, a star is 76 light-years away. How fast would you have to travel so that to you the distance would be only 39 light-years?
6 1. A red photon has a wavelength of 660 nm. How fast must a star...
6
1. A red photon has a wavelength of 660 nm. How fast must a star be moving toward the Earth for a red photon emitted by the star to change its color to an orange photon of wavelength 620 nm? You may, if you wish, express your answer either in m/s or in terms of the speed of light c (e.g., "0.021c"). [You'll need to do a little bit of algebra. Keep in mind that, by convention, the velocity...
*20. Imagine driving down a street toward a traffic light. How fast would you have to...
*20. Imagine driving down a street toward a traffic light. How fast would you have to go so that the red light (700 nm) would appear green (500 nm)? What fraction of the speed of light c (c = 300,000 km/s) is this velocity?
The standard frequency of the musical pitch called “middle C” is 261.6 Hz. How fast, in...
The standard frequency of the musical pitch called “middle C” is 261.6 Hz. How fast, in meters per second, would a source emitting a tone of middle C have to move toward you so that you would hear the pitch C# (C sharp) above middle C, with a frequency of 277.2 Hz? Assume that takes place in air at a high altitude, where the speed of sound is 303 m/s please show work
05. Light from a spaceship is observed, then the spaceship moves directly away from the observer...
05. Light from a spaceship is observed, then the spaceship moves directly away from the observer at high speed while still emitting the light. As a result, the light seen by the observer has: A. a higher frequency and a longer wavelength than before B. a lower frequency and a shorter wavelength than before C. a higher frequency and a shorter wavelength than before D. a lower frequency and a longer wavelength than before E. the same frequency and wavelength...
Question regarding "nothing moving faster than the speed of light": suppose a very bright light s...
question regarding "nothing moving faster than the speed of light": suppose a very bright light source is shining out into space. 100 meters from the light source, a rocket ship flies past at 0.5c. The ship's shadow is cast onto a planet that is 2000 meters away. Letting everything be in the same time frame, how fast is the ship's shadow moving?
a. How fast would a motorist have to be traveling for a yellow (1 = 590...
a. How fast would a motorist have to be traveling for a yellow (1 = 590 nm) traffic light to appear green (1 = 550 nm) because of the Doppler shift? Answer: x108 m/s b. Should the motorist be traveling toward or away from the traffic light to see this effect? Answer:
A very fast space-craft with a speed of 0.60c travels to the nearby star Alpha Ventura...
A very fast space-craft with a speed of 0.60c travels to the nearby star Alpha Ventura which is 7.5 light-years away from Earth. If the pilot turned 21 years old on the day that he left Earth, find the following: How much Earth time will have elapsed by the time that the craft arrives at Alpha Ventura? What is the biological age of the pilot when the craft arrives at Alpha Ventura?
Consider a spiral galaxy that is moving directly away from Earth with a speed V=3.24*10^5 at...
Consider a spiral galaxy that is moving directly away from Earth with a speed V=3.24*10^5 at its center. The galaxy is also rotating about its center such that points in the spiral arms are moving with a soeed V=5.750*10^5m/s relative to the center. If light with a frequency of 7.308*10^14Hz is emitted in both arms of the galaxy, what frequency is detected by astronomers observing the arm that is moving (a) toward and (b) away from Earth? Please break down...
E (t) = Eo cos (kz-wt) Where k is the wave-number and w is the angular...
E (t) = Eo cos (kz-wt) Where k is the wave-number and w is the angular frequency of the wave. Now some scientist tells you that a distant star has been observed to be green in color, with an observed frequency of fobserved 550 THz (terahertz, 1012). She also says that from other factors, it is known that the star should be emitting light with wavelength factual-1800 THz somewhere in the UV spectrum. They ask you to find two things...
6
1. A red photon has a wavelength of 660 nm. How fast must a star be moving toward the Earth for a red photon emitted by the star to change its color to an orange photon of wavelength 620 nm? You may, if you wish, express your answer either in m/s or in terms of the speed of light c (e.g., "0.021c"). [You'll need to do a little bit of algebra. Keep in mind that, by convention, the velocity...
*20. Imagine driving down a street toward a traffic light. How fast would you have to go so that the red light (700 nm) would appear green (500 nm)? What fraction of the speed of light c (c = 300,000 km/s) is this velocity?
05. Light from a spaceship is observed, then the spaceship moves directly away from the observer at high speed while still emitting the light. As a result, the light seen by the observer has: A. a higher frequency and a longer wavelength than before B. a lower frequency and a shorter wavelength than before C. a higher frequency and a shorter wavelength than before D. a lower frequency and a longer wavelength than before E. the same frequency and wavelength...
a. How fast would a motorist have to be traveling for a yellow (1 = 590 nm) traffic light to appear green (1 = 550 nm) because of the Doppler shift? Answer: x108 m/s b. Should the motorist be traveling toward or away from the traffic light to see this effect? Answer:
A very fast space-craft with a speed of 0.60c travels to the nearby star Alpha Ventura which is 7.5 light-years away from Earth. If the pilot turned 21 years old on the day that he left Earth, find the following: How much Earth time will have elapsed by the time that the craft arrives at Alpha Ventura? What is the biological age of the pilot when the craft arrives at Alpha Ventura?
E (t) = Eo cos (kz-wt) Where k is the wave-number and w is the angular frequency of the wave. Now some scientist tells you that a distant star has been observed to be green in color, with an observed frequency of fobserved 550 THz (terahertz, 1012). She also says that from other factors, it is known that the star should be emitting light with wavelength factual-1800 THz somewhere in the UV spectrum. They ask you to find two things...
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