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What is the path difference for the first minimum in a single-slit diffraction p

Practice Questions

Q1
What is the path difference for the first minimum in a single-slit diffraction pattern? (2021)
  1. λ/2
  2. λ
  3. 3λ/2
  4. λ/4

Questions & Step-by-Step Solutions

What is the path difference for the first minimum in a single-slit diffraction pattern? (2021)
  • Step 1: Understand that in single-slit diffraction, light passes through a narrow slit and spreads out.
  • Step 2: Know that the pattern created on a screen has bright and dark spots (minima and maxima).
  • Step 3: The first minimum occurs when the path difference between light from the top and bottom of the slit is half a wavelength (λ/2).
  • Step 4: This means that the light waves from the two edges of the slit cancel each other out at this point, creating a dark spot.
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