What is critical angle? Write down the relation between critical angle and refractive index.
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Critical angle is the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.
Example: if the critical angle of a glass slab is 30 then, if a ray of light is sent at morethan 30 degree the instead of refraction of light internal reflection takes place ..
Hope this helps..
Critical angle is the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.
Example: if the critical angle of a glass slab is 30 then, if a ray of light is sent at morethan 30 degree the instead of refraction of light internal reflection takes place ..
Hope this helps..
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