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CBSE Class 10 Answered

What is the focal length of a mirror whos magnification is m = +1?
Asked by | 24 Jan, 2010, 12:10: PM
answered-by-expert Expert Answer

Magnification = Image height/Object height = -image distance/object distance.

Since magnification = +1

Image distance = -Object distance.

1/Focal Length = 1/Image distance + 1/Object distance.

1/Focal Length = 0

Focal Length = Infinity.

Regards,

Team,

TopperLearning.

Answered by | 24 Jan, 2010, 02:45: PM

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