Question

A 2.0 cm tall object is placed 15 cm in front of a concave mirror of focal length 10 cm. What is the size and nature of the image?

(a) 4 cm, real

(b) 4 cm, virtual

(c) 1.0 cm. real

(d) none of these

Answer 1

Correct option (a) 4 cm, real

Explanation:

According to new cartesian sign convention, Object distance. u = -15 cm

Focal length of the concave mirror, f = -10 cm Height of the object, h₀ = 2 cm

According of mirror formula,

The image is formed at a distance of 30 cm mirror the mirror on the same side of the object. It is a real image.

Negative sign shows that image is inverted. The image is real, inverted, of size 4 cm at a distance of 30 cm in front of the mirror.