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In a double-slit experiment, if the intensity of light at the center of the frin

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Question: In a double-slit experiment, if the intensity of light at the center of the fringe pattern is I0, what is the intensity at the first minimum?

Options:

  1. 0
  2. I0
  3. I0/2
  4. I0/4

Correct Answer: 0

Solution: 

At the first minimum, the intensity is 0 due to destructive interference.

In a double-slit experiment, if the intensity of light at the center of the frin

Practice Questions

Q1
In a double-slit experiment, if the intensity of light at the center of the fringe pattern is I0, what is the intensity at the first minimum?
  1. 0
  2. I0
  3. I0/2
  4. I0/4

Questions & Step-by-Step Solutions

In a double-slit experiment, if the intensity of light at the center of the fringe pattern is I0, what is the intensity at the first minimum?
  • Step 1: Understand the double-slit experiment. It involves light passing through two slits and creating a pattern of bright and dark spots on a screen.
  • Step 2: Recognize that the bright spots are called maxima and the dark spots are called minima.
  • Step 3: The center of the fringe pattern is the brightest spot, where the intensity is I0.
  • Step 4: The first minimum is the first dark spot next to the center, where destructive interference occurs.
  • Step 5: In destructive interference, the light waves cancel each other out, resulting in no light.
  • Step 6: Therefore, at the first minimum, the intensity is 0.
  • Interference Patterns – The double-slit experiment demonstrates how light waves can interfere with each other, creating a pattern of bright and dark fringes based on constructive and destructive interference.
  • Destructive Interference – Occurs when two waves are out of phase, leading to a reduction in intensity, which is crucial for understanding the minima in the fringe pattern.
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