Q: What is retinal fatigue? A: When white object is seen after looking a bright object for a long time it does not appear its original colou...
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Q: Explain Brewster's Law. A: Let us take a glass slab of refracting index "μ". When the angle between refracted ray and refle...
Q: What do you mean by power of a lens? A: The power of deviating of a ray of light by a lens is inversely proportional to the focal length...