Question

please help in this question​

Answer 1

Answer:

1.the mirror used is concave mirror.

2. here you have to apply the formula

m=v/u

where m=magnification, v=image distance from mirror, u=object distance from mirror.

in this case you will take 50cm as the object distance so the answer is v=-50cm

3. here the formula 1/v+1/u=1/f will be used take v=-50, u=-50 because u is always taken negative..and this way u will get f=-25cm