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:

1f=1f1+1f2=P1100+P2100=1100f=100 cm

A convergent lens of focal length 100 cm.



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