Question

You wish to use a concave mirror of focal length 50 cm as a magnifying glass. Upto what distance can you stand from the mirror ?

(a) 100 cm

(b) 150 cm

(c) Infinite

(d) 50 cm

( Explain within 5-6 lines with valid reason ! )

Answer 1

Heya,

We know that the image formed by the concave mirror is enlarged when the object is kept on focus or between focus and pole. When the object is kept on focus the image is enlarged and formed at infinity. And if image is between focus and pole the image is formed at same side of mirror and it is also enlarged.

So, to form enlarged image the object should be kept at 50cm or less than 50cm before the mirror.

Hope this helps....:)