EM waves carry momentum and exert pressure: statements
This type of question, asked 3 times: 31 Jan 2024, 29 Jan 2025, 5 Apr 2026 S2. All 3 questions below, oldest first.
Try each one first, then open its answer.
Question 1
31 Jan 2024
100Given below are two statements: Statement I: Electromagnetic waves carry energy as they travel through space and this energy is equally shared by the electric and magnetic fields. Statement II: When electromagnetic waves strike a surface, a pressure is exerted on the surface. In the light of the above statements, choose the most appropriate answer from the options given below:Tap an option to check your answer.
Question 2
29 Jan 2025
20Given 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 :Tap an option to check your answer.
Question 3
5 Apr 2026 S2
14Given below are two statements : one is labelled as Assertion (A) : and the other is labelled as Reason (R). Assertion (A) : The electromagnetic wave exerts pressure on the surface on which they are allowed to fall. Reason (R) : There is no mass associated with the electromagnetic waves. In the light of the above statements, choose the correct answer from the options given below:Tap an option to check your answer.