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प्रश्न
When a ray of light travelling in air enters obliquely into a glass slab, it is observed that the light ray emerges parallel to the incident ray but it is shifted sideways slightly. Draw a labelled ray diagram to illustrate it.
आकृती
लघु उत्तर
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उत्तर
The emergent light beam is parallel to the incident light beam but slightly displaced to the side when it passes through a glass slab. In this instance, refraction occurs twice: first when the light enters the glass slab from the air and again when it leaves the glass slab and enters the air.
Refraction of light through a rectangular glass slab
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