Question

A laboratory experiment produces a single-slit diffraction pattern on a screen. If the slit is made narrower, the bright fringes will be A. Closer together. B. In the same positions. C. Farther apart. D. There will be no fringes because the conditions for diffraction won't be satisfied.

Answer 1

Answer:

option (c)

Explanation:

The relation between the distance between the fringes is given by

$y = \frac{D\lambda }{d}$

where, D is the distance between the plane of slit and the screen

d is the width of slit, λ is the wavelength of light used.

As the slit made narrower, that means d decreases, the value of y increases, that means the fringes move farther.