Question 417: Ray Optics

Question

The figure shows surface XY separating two transparent media, medium -1 and medium -2 . The lines ab and cd represent wavefronts of a light wave traveling in medium -1 and incident on X Y. The lines ef and gh represent wavefronts of the light wave in medium -2 after refraction.

Accepted Answer

Since point c and d are on same wave front.
Therefore, $$\phi_d=\phi_c$$
Similarly, $$\phi_e=\phi_f$$
$$	herefore~\phi_d-\phi_f=\phi_c-\phi_f$$

Answer

$$\phi_{c}$$ cannot be equal to $$\phi_{d}$$

Answer

$$\phi_{d}$$ can be equal to $$\phi_{c}$$

Answer

$$\left(\phi_{d}-\phi_{f}\right)$$ is equal to $$\left(\phi_{c}-\phi_{e}\right)$$

Answer

$$\left(\phi_{d}-\phi_{c}\right)$$ is not equal to $$\left(\phi_{f}-\phi_{e}\right)$$

Ray Optics

The figure shows surface XY separating two transparent media, medium -1 and medium -2 . The lines ab and cd represent wavefronts of a light wave traveling in medium -1 and incident on X Y. The lines ef and gh represent wavefronts of the light wave in medium -2 after refraction.

Choose the correct answer: