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A single slit of width 0.45 mm is illuminated with monochromatic light (λ = 650 nm)....

A single slit of width 0.45 mm is illuminated with monochromatic light (λ = 650 nm). A screen is placed 2.70 m from the slit to observe the fringe pattern. What is the distance from the main principle axis and the third dark fringe? Answer in cm.

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Answer #1

Answer:-        Distance :

Explanation:-

Let,

  • : be the width of the single slit.
  • : be the distance between screen and slit.
  • : be the required distance from the principle axis to third dark fringe.

Given:-

The distance from the main principle axis to the third dark fringe is given by,

Where, m is an integer which shows number of dark fringes. For third dark fringe value of m is 3,

This is the distance from the main principle axis and the third dark fringe.

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