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प्रश्न
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 ______.
पर्याय
plane mirror
convex mirror
glass slab
glass prism
MCQ
रिकाम्या जागा भरा
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उत्तर
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 glass slab.
Explanation:
In a glass slab, a parallel light beam refracts at the air-glass and glass-air interfaces. As it moves laterally, the emergent beam stays parallel to the incident beam. The thickness, angle of incidence, and refractive index of the slabs all affect this displacement.
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