Question

Describe the approximate value of the focal length of a concave mirror​

Answer 1

Direct the light reflected by the mirror on to a sheet of paper held close to the mirror. Move the sheet back and forth slowly until a bright, sharp spot of light is seen on the paper. The distance of this image from the position of the mirror gives the approximate value of focal length of the mirror.

Answer 2

$\huge\mathcal \red{զʊɛֆȶɨօռ}$

➼Describe the approximate value of the focal length of a concave mmirror

$\huge\fcolorbox{black}{lime}{❥ᴀ᭄ɴsᴡᴇʀ}$

✒❝Direct the light reflected by the mirror on to a sheet of paper held close to the mirror. Move the sheet back and forth slowly until a bright, sharp spot of light is seen on the paper. The distance of this image from the position of the mirror gives the approximate value of focal length of the mirror.❞࿐✰