If the source of light


If the source of light used in a Young's double slit experiment is changed from red to violet :

  1. consecutive fringe lines will come closer.

  2. the central bright fringe will become a dark fringe.

  3. the fringes will become brighter.

  4. the intensity of minima will increase.v

Correct Option: 1


$\beta=\frac{\lambda . D}{d}$


$\beta_{\mathrm{R}}=\frac{\lambda_{\mathrm{R}} \mathrm{D}}{\mathrm{d}}$ and $\beta_{\mathrm{V}}=\frac{\lambda_{\mathrm{V}} \mathrm{D}}{\mathrm{d}}$


Fringe pattern will shrink.

Option (1) is correct.

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