Q.

Stars appear twinkling because of ______ of light.

A. Reflection
B. Scattering
C. Emission
D. Absorption
Answer» B. Scattering
Explanation: The stars' light must travel through the Earth's multi-layered atmosphere, and as it does so it is refracted (bent) multiple times and in random directions. The phenomenon of random refraction appears to make the star wink as though it is in motion. It is this action that our eyes translate as twinkling.
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