Question

an object of 6cm in size is placed at a distance of 20 cm infront of a concave mirror of focal length 15cm find the position and nature of image and find the magnification and size of image​

Answer 1

Answer:

Real,inverted,u= -60com,m=+3

Explanation:

height if object=6cm

u= -20cm

f= -15cm

1/f=1/v+1/u

1/-15=1/v+1/-20

1/-15+1/20=1/v

-4+3/60=1/v

-1/60=1/v

v= -60cm

since,v is negative it is real and inverted.It is 60cm far from pole

m= -(-v)/u

= -(-60)/20

=+3