Given below are two statements | Wave Optics

JEE MAIN 2026

28-01-26 S1

Question

Given below are two statements:
Statement I : A plane wave after passing through prism remains as plane wave but passing through small pin hole may become spherical wave.
Statement II: The curvature of a spherical wave emerging from a slit will increase for increasing slit width.
In the light of the above statements, choose the correct answer from the options given below

Select the correct option:

Both Statement I and Statement II are false

Both Statement I and Statement II are true

Statement I is true but Statement II is false

Statement I is false but Statement II is true

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Increasing the slit width 'a' decreases the diffraction angle ( $\theta=\lambda / a$ ) and reduces the spreading of the wave. A narrower slit produces a more pronounced spherical wave (high curvature) while a wider slit leads to a flatter, less curved wave.

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JEE Main

Physics

Medium

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