MEDIUM
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IMPORTANT
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A point source of light is placed below the surface of the water of the refractive index . The minimum diameter of a disc, which should be placed over the source, on the surface of the water to the cut-off right coming out of water is
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Important Questions on Ray Optics
MEDIUM
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IMPORTANT
When a ray of light enters a medium of refractive index , it is observed that the angle of refraction is half of the angle of incidence is than angle of incidence is
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White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains
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A plane glass slab is placed over various coloured letters. The letter which appears to be raised the least is:
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A bubble in glass slab when viewed from one side appears at and from other side, then thickness of slab is:-
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Light travels through a glass plate of thickness and having a refractive index . If is the velocity of light in vacuum, the time taken by the light to travel this thickness of glass is
HARD
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A ray of light propagates from glass (refractive index ) to water (refractive index ). The value of the critical angle
MEDIUM
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IMPORTANT
Relation between critical angles of water and Class is
MEDIUM
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IMPORTANT
Critical angle of light passing from glass to air is minimum for
