Question Detail

PHY 104 Refraction Through Lenses and Optical Instruments Objective Question
Take CBT

Question

For thin lenses held in contact, how is the power of the combined lens determined?
Options
A By multiplying the powers of the individual lenses.
B By taking the inverse of the sum of the inverses of individual powers.
C By adding the powers of the individual lenses.
Correct Answer
D By subtracting the power of the weaker lens from the stronger one.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Page 20 demonstrates this: 'Add together the powers of each of the two lenses to get the power of the combined lens.' The example shows P_co = P_A + P_B.

Hint

Think about how lenses affect light when they are very close together; their effects are additive for power.

Question Info

Course: PHY 104
Topic: Refraction Through Lenses and Optical Instruments
Type: Objective
Difficulty: Not specified
Question 67 of 947
Previous Course Details Next