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What is the order of the first bright fringe in a single-slit diffraction patter

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Question: What is the order of the first bright fringe in a single-slit diffraction pattern?

Options:

  1. m = 0
  2. m = 1
  3. m = 2
  4. m = 3

Correct Answer: m = 0

Solution: 

In single-slit diffraction, the central maximum corresponds to m = 0, which is the first bright fringe.

What is the order of the first bright fringe in a single-slit diffraction patter

Practice Questions

Q1
What is the order of the first bright fringe in a single-slit diffraction pattern?
  1. m = 0
  2. m = 1
  3. m = 2
  4. m = 3

Questions & Step-by-Step Solutions

What is the order of the first bright fringe in a single-slit diffraction pattern?
  • Step 1: Understand that in single-slit diffraction, light passes through a narrow slit and spreads out.
  • Step 2: Recognize that the central bright spot is called the central maximum.
  • Step 3: Identify that the central maximum corresponds to the order number m = 0.
  • Step 4: Realize that the first bright fringe on either side of the central maximum is the first order fringe.
  • Step 5: Conclude that the order of the first bright fringe is m = 1.
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