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Question:

To determine the approximate value of the focal length of a given concave mirror, you focus the image of a distance object formed by the mirror on a screen. The image obtained on the screen, as compared to the object is always.

Laterally inverted and diminished

Erect and diminished

Inverted and diminished

Erect and highly diminished

Solution:

The ray diagram shows the image of a distant object kept in front of a concave mirror. The rays meet at the focus of the mirror and the image is point sized ,inverted, diminished and real ,as seen in the ray diagram above.