Question
What do you understand by interstellar reddening ? How is it caused ?
Answer :
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Interstellar reddening is a phenomenon observed in astronomy and astrophysics, where the light from stars appears redder than it actually is due to the scattering and absorption of shorter-wavelength light by interstellar dust particles. This effect is a result of the interaction between starlight and the fine dust grains that populate the interstellar medium—the vast space between stars in a galaxy.
The process
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