Question

According to Huygens principle the phase difference between oscillations of any two particles on a same wave front is ______ rad.

• A. $\pi/2$
• B. $\pi$
• C. 0
• D. $2\pi$

Hint:

Think of a "wavefront" like a row of soldiers marching in step. Every soldier in that row has the exact same "phase" (left foot down at the same time), so the difference between them is zero.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
A wavefront is defined as the locus of all points in a medium which oscillate in the same phase at any given instant.
Step 2: Detailed Explanation:
According to Huygens' Principle, every point on a wavefront acts as a source of secondary wavelets. Since every point on the same wavefront is reached by the primary disturbance at the same time, they all vibrate in unison. Therefore, the phase difference between any two points on the same wavefront is zero.
Step 3: Final Answer:
The phase difference is 0 rad.