Given below are two statements : one is labelled as Assertion (A) and other is labelled as Reason (R).
Assertion (A) : Electromagnetic waves carry energy but not momentum.
Reason (R) : Mass of a photon is zero.
In the light of the above statements, choose the most appropriate answer from the options given below :
1
(A) is true but (R) is false.
2
(A) is false but (R) is true.
3
Both (A) and (R) are true but (R) is not the correct explanation of (A).
4
Both (A) and (R) are true and (R) is the correct explanation of (A).