Question

Calculate distance of an object of height h from a concave mirror of focal length 10 cm so as to obtain a real

Answer 1

Explanation:

Let u be the object distance and v be the image distance and the magnification of the mirror be represented by m.

We know, f is the focal length.

Given,

height of object = h  

focal length , f = 10 cm.

m = - 2 (concave mirror)

mirror = concave  

-2 = -

v = 2 u  

By the Mirror formula,

On solving,

Thus the object should be placed at 15 cm in front of mirror.

Answer 2

Answer:

Calculate the distance of an object of height h from a concave mirror of focal length 10cm, so as to obtain a real image of magnification 2.

1. -2 = - v = 2 u. By the Mirror formula,

2. On solving,

3. Thus the object should be placed at 15 cm in front of mirror.