Question

Which scientific phenomenon helps scientists determine the chemical composition of some stars?

absorption of light in a star’s atmosphere
dispersion of light as it enters Earth’s atmosphere
reflection of light
refraction of light

Answer 1

The correct option is DISPERSION OF LIGHT AS IT ENTERS EARTH'S ATMOSPHERE. Scientists use astronomical spectrometer to analyse the composition of the sun and the stars. Astronomical spectrometer works on the basis of dispersion of light as it enters the earth's atmosphere.

Answer 2

Answer:

The answer is actually absorption of light in a star’s atmosphere

Explanation:

I chose "dispersion of light as it enters Earth's atmosphere" in a test and got it wrong. It showed the correct answer to be absorption of light in a star’s atmosphere.