For Young's double slit experiment, two statements are given belo… - Vidyadip

Question

For Young's double slit experiment, two statements are given below :

Statement $I:$ If screen is moved away from the plane of slits, angular separation of the fringes remains constant.

Statement $II:$ If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.

In the light of the above statements, choose the correct answer from the options given below :

✓

Answer

Angular width, $\theta_w=\frac{\lambda}{d}$

$\theta_w$ independent of $D$ but depends on $\lambda$

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