Question

Double slit experiment performed by Thomas Young showed that light coming from two coherent sources interfere and produce maxima and minima depending on the path difference. This experiment shows that light behaves as-

Answer 1

When two coherent light waves interfere, <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> maxima and minima are formed depending on the phase difference between them. This phase difference is due to the path difference between the rays emitted from the two sources. Hence, Young's double-slit experiment shows wave nature of the light.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(\text{B}\right)$ is the correct answer.

Why this question ? When a coherent source illuminates through the two slits, the pattern observed on the screen consists of large number of equally spaced bright and dark bands called “interference fringes".