# If the Separation Between the Slits in a Young'Sdouble Slit Experiment is Increased,What Happens to the Fringe-width?If the Separation is Increased Too Much, Will the Fringe Pattern Remain Detectable? - Physics

Sum

If the separation between the slits in a Young's double slit experiment is increased, what happens to the fringe-width? If the separation is increased too much, will the fringe pattern remain detectable?

#### Solution

The fringe width in Young's double slit experiment depends on the separation of the slits.

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

where

$\lambda =\text{ wavelength}$

$\chi =\text{ fringe width}$

$D =\text{ distance between slits and screen}$

$d =\text{ separation between slits}$

On increasing d, fringe width decreases. If the separation is increased too much, the fringes will merge with each other and the fringe pattern won't be detectable.

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#### APPEARS IN

HC Verma Class 11, 12 Concepts of Physics 1
Chapter 17 Light Waves
Short Answers | Q 10 | Page 379