Question

a spherical mirror is making a highly diminished image at 10cm of an object AB that is kept very far away. What is radius of curvature of the mirror.



I will mark brainliest for the correct anwer

Answer 1

Final Answer: The radius of curvature is 20 cm.

Explanation: The spherical (concave) mirror diminished the image which is kept at infinite and its image is at 10 cm.

u = ∞

v = 10 cm

By the formula of the concave mirror, we have

$\frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\\frac{1}{f} = \frac{1}{10} + \frac{1}{infinity} \\\frac{1}{f} = \frac{1}{10} + 0\\\frac{1}{f} = \frac{1}{10} \\f = 10 cm$

We know that, R = 2f

                         R = 2 × 10 = 20 cm.

Answer 2

Answer:

20 cm is the correct answer