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MHT CET Medical202622 April 2026Morning ShiftPhysicsWave OpticsActual

Young's double slit experiment is carried out by using green, red and blue light, one colour at a time. The fringewidths recorded are W_G , W_R and W_B respectively. Then

Options

  1. AW_B > W_G > W_R
  2. BW_R > W_B > W_G
  3. CW_R > W_G > W_B
  4. DW_G > W_B > W_R

Correct answer

C. W_R > W_G > W_B

Step-by-step solution

The fringe width in Young's double slit experiment is given by W = D d . For a given experimental setup, D and d are constant, so W . The wavelengths of red, green, and blue light follow the order _R > _G > _B . Therefore, the corresponding fringe widths will be in the order W_R > W_G > W_B . Answer: W_R > W_G > W_B

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