1. Tardigrade
  2. Question
  3. Physics
  4. 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.

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

Wave Optics

Solution:

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