Question

Can anyone please Explain the above diagrams please....

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Answer 1

when the light rays Ada band or change the direction while passing from one medium to another it is called refraction of light.

Case 1;

when light Ray's travels from optically rarer medium to denser medium then the bend towards normal. in this case angle of refraction is smaller than angle of incidence.

when light rays travel from air into glass or from air into water, it bends normal. this because the speed of light rays decrease while travelling from air into glass of water.

Case 2 ;

when light Ray's travels from optically denser medium to rarer medium then the band away from the normal. in this case the angle of refraction is greater than angle of incidence.

when light Ray's travel from glass into air or from water into air the band away from the normal.the speed of the light rays increased while travelling from glass or water into air.

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