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Rules of Ray Diagram for Representation of Images Formed

To determine ...

Question

To determine focal length of a concave mirror a student obtains the image of a well lit distant object on a screen. To determine the focal length of the given concave mirror he needs to measures the distance between:

A

Mirror and the object

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B

Mirror and the screen

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C

Screen and the object

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D

Screen and the object and also mirror and the screen

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Solution

The correct option is B Mirror and the screen
Focal length is the distance between the focus and the mirror. The image of the distant object forms at the focus of the mirror.

The Correct Answer is B

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