Question 391: Wave Optics

Question

If a star emitting yellow light is accelerated towards earth, then to an observer on earth it will appear

Accepted Answer

Due to the doppler's effect of light, when an object moves closer to source the light moves to the blue end of the spectrum, as its wavelength get shorter. (or frequency increases) Thus, if a star emitting yellow light and is accelerating towards an observer on earth, it will appear that its colour is gradually changing to blue. So, option (c) is correct.

Answer

becoming orange.

Answer

shining yellow.

Answer

gradually changing to blue.

Answer

gradually changing to red.

Wave Optics

If a star emitting yellow light is accelerated towards earth, then to an observer on earth it will appear

Choose the correct answer: