Question:medium
An optical device ‘X’ is placed obliquely in the path of a narrow parallel beam of light. If the emergent beam gets displaced laterally, the device ‘X’ is:
An optical device ‘X’ is placed obliquely in the path of a narrow parallel beam of light. If the emergent beam gets displaced laterally, the device ‘X’ is:
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A glass slab causes lateral displacement of light without altering the direction of the light, while other devices may bend or focus the light differently.
Updated On: Jan 13, 2026
- Plane mirror
- Convex lens
- Glass slab
- Glass prism
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The Correct Option is C
Solution and Explanation
A glass slab induces lateral displacement of light, preserving its original direction. Light refraction occurs at both surfaces of a glass slab, leading to lateral displacement of the emergent ray relative to the incident ray. This behavior distinguishes a glass slab from a plane mirror (reflection), a lens (focusing), or a prism (dispersion).
Therefore, the correct answer is option (3).
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