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A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is
  • a)
    Zero
  • b)
    π
  • c)
    π/2
  • d)
    2 π
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A parallel monochromatic beam of light is incident normally on a narro...
Π (or 180 degrees)
c) π/2 (or 90 degrees)
d) π/4 (or 45 degrees)

Answer:

b) π (or 180 degrees)

Explanation:

At the first minimum of the diffraction pattern, the waves coming from the two edges of the slit are out of phase by π (or 180 degrees). This is because at the minimum, the waves interfere destructively, meaning that the crest of one wave coincides with the trough of the other wave, resulting in cancellation of the amplitude. This phase difference of π is important in understanding the behavior of light waves in diffraction and interference phenomena.
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A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit isa)Zerob)πc)π/2d)2 πCorrect answer is option 'D'. Can you explain this answer?
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