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FinnZ [79.3K]
3 years ago
13

Light of wavelength 575 nm passes through a double-slit and the third order bright fringe is seen at an angle of 6.5^degree away

from the central fringe. What is the separation between the double slits? a) 5.0 mu m b) 10 mu m c) 15 mu m d) 20 mu m e) 25 mu m
Physics
1 answer:
Anon25 [30]3 years ago
4 0

Answer:

The correct option is C

Explanation:

From the question we are told that

   The wavelength is  \lambda  =  575 *10^{-9} \  m

    The  angle is  \theta  =  6.5^o

    The order of maxima  is  n =  3

Generally for  constructive interference

       dsin \theta  =  n  *  \lambda

=>   d =  \frac{n  *  \lambda }{  sin \theta }

=>   d =  \frac{3   *  575 *10^{-9} }{  sin 6.5  }

=>   d = 15.24 *10^{-6} \  m

=>  d = 15 \mu  m

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