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Assertion : When a plane wave passes thr...

Assertion : When a plane wave passes through a thin prism, the emerging wavefront gets tilted.
Reason : Speed of light is less is glass than in air.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the assertion and reason question, we will analyze both the assertion and the reason step by step. ### Step 1: Understand the Assertion The assertion states that when a plane wave passes through a thin prism, the emerging wavefront gets tilted. - **Explanation**: When a plane wavefront enters a prism, it encounters a change in medium (from air to glass). Due to the prism's geometry and the change in speed of light in different media, the wavefront is refracted, leading to a tilt in the emerging wavefront. ### Step 2: Understand the Reason The reason given is that the speed of light is less in glass than in air. - **Explanation**: This statement is true. The speed of light in a medium is determined by its refractive index. Glass has a higher refractive index than air, which means light travels slower in glass than in air. This difference in speed is what causes the bending (refraction) of the light ray as it passes through the prism. ### Step 3: Connect Assertion and Reason Now, we need to determine if the reason provided correctly explains the assertion. - The assertion is true because the wavefront does get tilted when passing through the prism. - The reason is also true as it explains why the light ray bends (or refracts) when it enters the prism due to the difference in speed of light in glass and air. ### Conclusion Since both the assertion and reason are true, and the reason correctly explains the assertion, we can conclude that: **Both assertion and reason are true, and the reason is the correct explanation of the assertion.** ### Final Answer The correct option is: Both assertion and reason are true, and the reason is the correct explanation of the assertion. ---
To solve the assertion and reason question, we will analyze both the assertion and the reason step by step. ### Step 1: Understand the Assertion The assertion states that when a plane wave passes through a thin prism, the emerging wavefront gets tilted. - **Explanation**: When a plane wavefront enters a prism, it encounters a change in medium (from air to glass). Due to the prism's geometry and the change in speed of light in different media, the wavefront is refracted, leading to a tilt in the emerging wavefront. ### Step 2: Understand the Reason ...
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