Question Detail

PHY 104 Refraction Through Lenses and Optical Instruments Objective Question
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Question

In the Lensmaker's Equation, how is the radius of curvature for a concave surface treated in terms of its sign?
Options
A It must always be considered positive.
B It must always be considered negative.
Correct Answer
C Its sign depends on the index of refraction of the lens material.
D Its sign depends on whether the lens is converging or diverging.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 25 specifies: 'It also works for lenses with one or both surfaces concave; but for concave surface, the radius must be considered negative.'

Hint

The convention for radius of curvature depends on whether the surface bulges towards or away from the incoming light.

Question Info

Course: PHY 104
Topic: Refraction Through Lenses and Optical Instruments
Type: Objective
Difficulty: Not specified
Question 111 of 947
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