electromagnetic-waves Question 18
Question: Q. 8. (i) If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now ? Explain.
(ii) An EM wave exerts pressure on the surface on which it is incident. Justify. U[Delhi I, II, III 2014]
Show Answer
Solution:
Ans. (i) Average surface temperature would be lower. Because there would be no green house effect in absence of atmosphere.
$1 / 2+1 / 2$
(ii) Since electromagnetic waves carry both energy and momentum, therefore, they exert pressure on the surface on which they are incident.
1
[CBSE Marking Scheme 2014]
