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According to the "New Cartesian Singh Convention" for Mirrors, What Sign Has Been Given to the Focal Length Of: A Concave Mirror? - Science

According to the "New Cartesian Singh Convention" for mirrors, what sign has been given to the focal length of: 

 a concave mirror?

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Solution

The sign given to the focal length of a concave mirror (according to the New Cartesian Sign Convention) is negative. This is because the focus of a concave mirror is in front of the mirror, on the left side.

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Lakhmir Singh Class 10 Physics (Science)
Chapter 4 Reflection of Light
Q 1 | Page 192
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