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In Young's double slit experiment, 50 fringes are observed in the central view zone with light of wavelength

4000 \, \mathop {\text{A}}\limits^ \circ.

The number of fringes that will be observed in the same view zone with the light of wavelength

5000 \, \mathop {\text{A}}\limits^ \circ

is

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Correct option: D

40

Option D (40) is correct because the number of fringes is inversely proportional to the wavelength of light used in Young's double slit experiment.

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