A Lens of Focal Length 10

question 117

Multiple Choice

A lens of focal length 10.0 cm is placed in contact with another lens, the combination having a focal length of 20.0 cm. The focal length of the second lens is

• A)200 cm.
• B)-20.0 cm.
• C)-10.0 cm.
• D)10.0 cm.
• E)20.0 cm.

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