Question

In interference and diffraction, the light energy is redistributed. If it reduces in one region, producing a dark fringe, it increases in another region, producing a bright fringe.
A. As there is no gain or loss of energy, these phenomena are consistent with the principle of conservation of energy.
B. Diffraction and interference are characteristics exhibited only by light waves.
Choose the correct answer from the options given below:

• A. A is false, but B is true
• B. A is true and B is also true
• C. A is true, but B is false
• D. Both A and B are false

Hint:

Remember that "Interference" is the fundamental test for wave nature. If something (like an electron or a sound pulse) can interfere, it is behaving as a wave.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Interference and diffraction are wave phenomena. They involve the superposition of waves, leading to the redistribution of energy in space.

Step 2: Detailed Explanation:
1. Statement A: In these phenomena, energy is not created or destroyed; it is merely moved from "dark" regions to "bright" regions. The average intensity remains equal to the sum of individual intensities. This is perfectly consistent with the Law of Conservation of Energy. (True) 2. Statement B: These are characteristics of all waves, not just light. Sound waves, water waves, and even matter waves (electrons) exhibit interference and diffraction. (False)

Step 3: Final Answer:
Statement A is true, but Statement B is false.