Physics
State one advantage of using a total reflecting prism as a reflector in place of a plane mirror.
Refraction Plane Surfaces
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Answer
The advantage of using a total reflecting prism as a reflector in place of a plane mirror, is that the image is much brighter and the brightness remains unchanged even after the long use of the total reflecting device.
In the case of a plane mirror, the image is less bright and the brightness gradually decreases as the silvering on mirror becomes old and rough.
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