Question Detail

PHY 104 Refraction Through Lenses and Optical Instruments Objective Question
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Question

What is spherical aberration in lenses?
Options
A Light of different wavelengths focusing at different points.
B Variation in magnification with distance from the lens, causing distortion.
C Rays far from the lens axis not focusing at the same point as rays close to the axis.
Correct Answer
D The lens being made of an imperfectly uniform material.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Page 59 defines spherical aberration as: 'rays far from the lens axis do not focus at the focal point.' This means that a single focal point cannot be achieved for all incoming parallel rays.

Hint

Consider the path of light rays that pass through the edges of a spherical lens compared to those passing through its center.

Question Info

Course: PHY 104
Topic: Refraction Through Lenses and Optical Instruments
Type: Objective
Difficulty: Not specified
Question 115 of 947
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