Ray Optics and Optical Instruments
2 solved JEE Physics previous year questions on Ray Optics and Optical Instruments, each with the correct answer and a full explanation.
Q1
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
✓ Correct answer: c) large focal length and large diameter
ExplanationThis contributes to high angular magnification, as a longer focal length lens bends light more, creating a larger image for a given object size.
Q2
The reddish appearance of the sun at sunrise and sunset is due to the-
✓ Correct answer: a) scattering of light.
ExplanationAt sunrise and sunset, sunlight travels a longer path through the atmosphere.Shorter wavelengths are scattered away more, so mainly red/orange light reaches our eyes.
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