Question

why totally reflecting prisms are preffered over plane mirrors?​

Answer 1

Answer:

plane mirror just reflect the light but them light reflecting through the prism leaves 7 different colours that is VIBGYOR

Answer 2

Answer:

Hii,

Explanation:

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In total internal reflection there is no significant loss of energy and the reflected ray has whole of the energy of incident light wave so a brighter image is formed, but in plane mirror some energy is absorbed inside hence loss of energy.

The use of a total reflecting prism gives us an image much brighter than that obtained by using a plane mirror. It is for this reason that a total reflecting prism is used in place of a plane mirror to deviate the light ray 90o in a periscope and by 180o in a binocular and in cameras.

Hope it will help you...

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