Question

distance of object from a concave mirror of"y" is 10cm
that the image size is four times
the size of object ?

double answer question​

Answer 1

Answer:

m= I/O

let size of object= x

4x/x= v/-u

v= -4u

now put all values in the formula

1/f= 1/v-1/u

ok

as u is negative so

1/10= 1/v+1/4v

now solve it ok