SATHEE: Optics Question 579

Optics Question 579

Question: A lens of power + 2 diopters is placed in contact with a lens of power - 1 diopter. The combination will behave like

Options:

A) A convergent lens of focal length 50 cm

B) A divergent lens of focal length 100 cm

C) A convergent lens of focal length 100 cm

D) A convergent lens of focal length 200 cm

Show Answer

Answer:

Correct Answer: C

Solution:

$\frac{1}{f} = \frac{1}{f_{1}} + \frac{1}{f_{2}} = \frac{P_{1}}{100} + \frac{P_{2}}{100} = \frac{1}{100} \Rightarrow f = 100$ cm

$∴$ A convergent lens of focal length 100 cm.

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Optics Question 579

Question: A lens of power + 2 diopters is placed in contact with a lens of power - 1 diopter. The combination will behave like

Options:

Answer:

Solution:

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