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Why is focal length of plane …

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Why is focal length of plane mirror infinity?

Posted by Deepshikha Meghwal 8 years ago

CBSE > Class 10 > Science

1 answers

Kritika Trehan 8 years ago

Focal length is the point half of radius. This radius is obtained by extenteding the edges of lens to obtain a imaginary circle. And then we get center of circle, C. Focal lenth is half of radius. So, technically a plane mirror never going to be a circle. But, in hypothetically we say it will be a circle of infinite radius. Hence, focal length is also INFINITE.

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Posted by Pandey Ji 5 months, 4 weeks ago

CBSE > Class 10 > Science