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  • On introducing a thin mica sheet of thickness <img alt="2 \times 10^{-6} \mathrm{~m}" src="https://entrancecorner.oncodecogs.com/gif.latex?2%20%5Ctimes%2010%5E%7B-6%7D%20%5Cmathrm%7B%7Em%7D" /

On introducing a thin mica sheet of thickness 2 \times 10^{-6} \mathrm{~m} and refractive index 1.5 in the path of one of the waves, central bright maxima shifts by \mathrm{n} fringes. Wavelength of the wave used is 5000 \AA, then \mathrm{n} is

Option: 1

1


Option: 2

2


Option: 3

5


Option: 4

10


Answers (1)

best_answer

shift in no. of fringes is given by

\mathrm{n} \lambda=(\mathrm{u}-1) \mathrm{t}
\mathrm{n}=\frac{(u-1) \mathrm{t}}{\lambda}=\frac{(1.5-1) \times 2 \times 10^{-6}}{5000 \times 10^{-10}} \text { fringes }=2

Posted by

SANGALDEEP SINGH

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