Question : The purpose of an optical filter is to___________.
Option 1: reflect lights of different colours
Option 2: dispense light into component colours
Option 3: refract the light of different colours
Option 4: transmit or absorb light of different colours
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Correct Answer: transmit or absorb light of different colours
Solution : The correct answer is to transmit or absorb light of different colours
An optical filter is a device that selectively transmits light of different wavelengths or can pass a particular range of wavelengths while blocking the remainder. These devices are commonly used in photography, microscopy etc.
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