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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Related Questions
The table below gives refractive inidices of some substances with respect to air.
Substance Refractive Index (μ) Water 1.33 Turpentine 1.47 Glass 1.58 Diamond 2.41 (a) Which medium will have the lowest critical angle and which will have highest critical angle with respect to air.
(b) If the temperature of all the substances is raised by 30o C, what will happen to their critical angle?
Mention one difference between the reflection of light from a plane mirror and total internal reflection of light from a prism.
Explain the term critical angle with the aid of a labelled diagram.
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