In a Young's double slit experiment with wavelength 5890˙A, there are

Question

In a Young's double slit experiment with wavelength

5890 ˙ A

, there are 60 fringes in the field of vision How many fringes will be observed in the same field of vision if wavelength used is

5460 ˙ A

Options:

A . 65

B . 60

C . 55

D . 50

Answer: Option A
:
A

n_{1} λ_{1} = n_{2} λ_{2}

60 \times 5890 = n_{2} 5460

n_{2} = 65

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