JEE Main202529 Jan 2025Morning ShiftPhysicsElectromagnetic WavesActual
Given below are two statements : one is labelled as Assertion (A) and the 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 :
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (( A ) )
- BBoth (( A ) ) and (( R ) ) are true but (( R ) ) is not the correct explanation of (( A ) )
- C(A) is false but (R) is true
- D(A) is true but ( ( R )) is false
Correct answer
C. (A) is false but (R) is true
Step-by-step solution
EM wave carry both energy and momentum. Rest mass of photon is zero.