Camera Fitted With Lens Of Focal Length Being Used Photograph Flower That Is Cm In Diameter

A camera fitted with a lens of focal length 50 mm is being used to photograph a flower that is 5 cm … film? (c) What is the nature…

Answers:

(a) u = -20 cm = -200 mm

f = 50 mm

1/v – 1/u = 1/f

1/v – 1/-200 = 1/50

1/v = 1/50 – 1/200

1/v = 3/200

V = 66.6 mm = 6.66 cm

The film should be at a distance of 6.66 cm behind the camera lens.

(b) d1 =  5 cm  = 50 mm

 m = v/u = d2/d1

66.6/-200 = d2/50

d2 = 16.65 mm = 1.66 cm

(c) It is a convex lens.