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MHT CET202311 May 2023Evening ShiftPhysicsWave OpticsActual

In Young's, double slit experiment, green light is incident on two slits. The interference pattern is observed on a screen. Which one of the following changes would cause the observed fringes to be more closely spaced?

Options

  1. AReducing the separation between the slits
  2. BUsing blue light instead of green light
  3. CUsing red light instead of green light
  4. DMoving the screen away from the slits

Correct answer

B. Using blue light instead of green light

Step-by-step solution

The formula for fringe width is W= D d W , W D and W 1 If the distance from the screen is increased, the width will increase. If the distance between the slit is decreased, the width will increase. As the wavelength will decrease the distance between the fringes will decrease. _ nd > _ erex > _ max Blue light should be used.

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