**Assertion (A):** When electromagnetic waves are incident on a surface, exert radiation pressure on the surface.
**Reason (R):** Electromagnetic waves carry energy as well as momentum.
Both (A) &(R) are true and the (R) is the correct explanation of the (A)
Both (A) &(R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false
Solution:
EM waves carry momentum. When they strike a surface, their momentum changes, exerting a force and thus pressure. Therefore, Assertion and Reason are true, and R is the correct explanation for A.
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