Question

1. As shown above, the rocket fires the laser beem in eight directions. if the rocket's velocity is 0.4 times, 0.9 times, 0.99 times the speed of light, find the direction of the beam visible to the observer. And express the result in a picture.

2.what is the speed required for a beam expressed in red to be observed as a beam with an angle of 45 degrees(blue arrow) from the front?

3.If the wavelength of the beam expressed in red is 400nm, what is the wavelength observed by the relative doppler effect?

Answer 1