Question 34
Light and ReflectionA real image three times the size of an object is formed 24 cm from a converging mirror. What is the focal length of the mirror?
- A.8 cm
- B.16cm
- C.6 cm
- D.12 cm
Show the answer and explanation
Answer: C (6 cm)
Explanation
m = v/u = 3 with v = 24 cm gives u = 8 cm. 1/f = 1/8 + 1/24 = 4/24, so f = 6 cm.