The light from a nearby star is observed to be red-shifted by 10% Is the star approaching or receding from the earth? How fast is it moving?
The light from a nearby star is observed to be red-shifted by 10% Is the star...
When viewed by an observer on the Earth, light from a distant galaxy is Doppler shifted to the red such that the ratio of the unshifted frequency to the observed frequency is 1.6. What is the galaxy's speed relative to the Earth?
4 that has 400nm- observed is 450nm. A distant galaxy, emits light a warelength of On Earth, the wavelength a) is the galaxy receding approaching b) Find the roo speed of the galaxy with respect to Earth or
observed is 4 50nm. 4 - A A distant galaxy emits light that has a wavelength of 400nm. On Earth, the wavelength a) is the galaxy galaxy receding or approaching b) Find the roo speed of the galaxy with respect to Earth
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?
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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...
Processes at the center of a nearby galaxy cause the emission of electromagnetic radiation at a frequency of 2.95 × 10 13 Hz . Detectors on Earth measure the frequency of this radiation as 2.27 × 10 13 Hz . How fast is the galaxy receding from Earth?
1) For a star that is moving away from the Earth, a) the spectral lines of the star are much narrower than the spectral lines of an identical star that is not moving towards or away from the earth. b) the spectral lines of the star are shifted towards the blue end of the spectrum compared to an identical star that is not moving towards or away from the earth. c) the spectral lines of the star are shifted towards...
Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000×1014Hz. If the galaxy is receding from Earth with a speed of 4875 km/s, what is the frequency of the light when it reaches Earth?
Electromagnetic radiation from a star is observed with an earth-based telescope. The star is moving away from the earth with a speed of 0.570c. If the radiation has a frequency of 8.64×1014Hz in the rest frame of the star, what is the frequency measured by an observer on earth? Express your answer with the appropriate units.
Question 2: The atomic lines of a star are observed to be shifted and relative to their normal positions. This is due to the radial velocity of the star (i.e. the component of the star's velocity along the line-of-sight). If the shift of the Hp line is A1 = +0.4 Å, what is the value and the direction of the radial velocity of the star?