Question

What is blue shift? Sodium light of wavelength 5890 Å travelling from a galaxy is observedhe 5896 A. What is the speed of the galaxy?​

Answer 1

Answer:

the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving towards the observer.

The wavelength of sodium light in air is 5890 Å . The velocity of light in air is

. The wavelength of light in a glass of refractive index 1.6 would be close to