The Lens Formula Relating the Image Distance, P , to the Focal

question 97

Multiple Choice

The lens formula relating the image distance, p , to the focal length, f , and object distance, s , is
The magnification of a lens is
A movie projector is equipped with a 0.5-m focal length lens that is positioned 0.505 m in front of the film. The distance in front of the lens that a screen must be placed for an image to be in focus is

• A) 0.5 m.
• B) 0.505 m.
• C) 50.5 m.
• D) 500 m.
• E) 505 m.

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