| Directions (Q. No. 1 to 7): In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. |
| Assertion (A): Electromagnetic radiation exerts pressure. |
| Reason (R): Electromagnetic waves carry momentum and energy. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: B
Solution :
Option [b] is correct Explanation: Electromagnetic radiation is composed of photons which has momentum \[(\lambda /h)\]and energy (hv). When photon is incident on a surface, its momentum changes which gives rise to radiation pressure. So, the assertion and reason both are true but the reason does not explain the assertion.
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