Answer:
Distance of the image = q = - 6.7 cm
Explanation:
As the lens is concave so, distance of image and focal length will be negative.
Focal length = f = -10 cm
Object distance = p = 20 m
Height of object = h = 14 cm
Distance of image = q = ?
Using concave lens formula,
1/f = 1/p + 1/q ………… (i)
By putting values in equation (i)
1/f – 1/p = 1/q
(1/-10) – (1/20) = 1/q
1/p = -3/20
p = -20/3
p = -6.6666 = -6.7 cm
