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CBSE Class 10 Answered

Explain refraction of light through a glass slab
Asked by madhavam | 21 Jul, 2009, 09:42: PM
answered-by-expert Expert Answer

  • When a ray light is passing from air to glass, that is, from a rarer medium to a denser medium, the refracted ray bends towards the normal drawn at the point of incidence. In this case i > r. But when the ray of light is passing from glass to air, that is, from a denser medium to a rarer medium the refracted ray bends away from the normal. In this case r > i.
  • The emergent ray, O1E which is nothing but the refracted ray emerging out of the glass slab is parallel to the incident ray. This means that the refracted ray (emergent ray) has been displaced from its original path by a distance XY. This displacement is referred to as lateral displacement.

Answered by | 22 Jul, 2009, 04:56: PM

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