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One use of corner reflectors relying on total internal reflection is mentioned for which optical instrument?
ABinoculars
BMicrowave ovens
CCompact discs
DWeather radar
Answer & Solution
Correct answer: A. Binoculars
1. Corner reflectors that rely on total internal reflection are described as being used in binoculars.
2. Periscopes used in submarines are given as a further application of the same corner-reflector idea.
3. Microwave ovens, compact discs and weather radar are not the application named alongside binoculars here.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.2 Refraction_
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