Question

question 9
earth’s atmosphere would be best considered as a(n):
a reflector of all radiation
b blackbody
c selective absorber
d absorber of all radiation

Explanation:

• Option A: Atmosphere doesn't reflect all radiation (e.g., some UV is absorbed).
• Option B: A blackbody absorbs all radiation, but atmosphere isn't a perfect blackbody.
• Option C: Atmosphere absorbs specific wavelengths (e.g., CO₂ absorbs infrared), so it's a selective absorber.
• Option D: Atmosphere doesn't absorb all radiation (e.g., visible light passes through).

Answer:

C. Selective absorber