Question

.A concave mirror produces an image of 2 cm tall, when an object of 5 mm tall is placed at a distance of 10 cm from the mirror. Calculate the image distance and Focal length of the mirror ​

Answer 1

Answer:

h = 0.5 cm

h’ = -2 cm

u = -10 cm

m = h’/h = -v/u

-2/0.5 = -v/-10

V = -40 cm

1/v + 1/u = 1/f

1/(-40) + 1/(=10) = 1/f

1/f = (-1 -4)/40

1/f = -5/40

F = -40/5

F = -8 cm

Hence the focal point will be -8 cm and the height real image of the object will be 40 cm.