Statement I: According to Huygen's principle, no backward wave-front is possible. Statement II: Amplitude of secondary wavelet is proportional to (1+ cos θ) where θ is the angle between the ray at the point of consideration and the direction of secondary wavelet.

Question

Statement I: According to Huygen's principle, no backward wave-front is possible. Statement II: Amplitude of secondary wavelet is proportional to (1+ cos θ) where θ is the angle between the ray at the point of consideration and the direction of secondary wavelet. (A) Both statement I and II are correct (B) Both statement I and II are incorrect. (C) Statement I correct but statement II is incorrect. (D) Statement II is correct but statement I is incorrect.

Tardigrade Admin · Accepted Answer

Correct answer is (b) Both statement I and II are incorrect.

Q. Statement I : According to Huygen's principle, no backward wave-front is possible. Statement II : Amplitude of secondary wavelet is proportional to (1+cosθ) where θ is the angle between the ray at the point of consideration and the direction of secondary wavelet.

Both statement I and II are correct

Both statement I and II are incorrect.

Statement I correct but statement II is incorrect.

Statement II is correct but statement I is incorrect.

Correct answer is (b) Both statement I and II are incorrect.

Q. Statement I : According to Huygen's principle, no backward wave-front is possible.
Statement II : Amplitude of secondary wavelet is proportional to $(1 + cos θ)$ where $θ$ is the angle between the ray at the point of consideration and the direction of secondary wavelet.