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

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Question: What is the path difference for the first minimum in a single-slit diffraction pattern? (2021)

Options:

Correct Answer: λ/2

Exam Year: 2021

Solution:

The path difference for the first minimum in single-slit diffraction is λ/2.

What is the path difference for the first minimum in a single-slit diffraction pattern? (2021)

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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