Question Detail

PHY 104 Refraction Through Lenses and Optical Instruments Objective Question
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Question

For a magnifying glass when the eye is relaxed (focused at infinity), what is the formula for angular magnification (M), where N is the near point distance and f is the focal length?
Options
A M = <i>f</i> / N
B M = N / <i>f</i>
Correct Answer
C M = N / <i>f</i> + 1
D M = <i>f</i> + N
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 50 shows the formula for 'eye focused at ∞' as M = N / f.

Hint

The magnification for a relaxed eye depends on the ratio of the near point to the focal length.

Question Info

Course: PHY 104
Topic: Refraction Through Lenses and Optical Instruments
Type: Objective
Difficulty: Not specified
Question 101 of 947
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