When an object is placed at a distance of 60 cm from a mirror, a real, inverted image is formed at a distance of 30 cm in front of a concave mirror. Which of the following statements best describes the focal length of the mirror?

Subject: General Awareness | Topic: Science | Difficulty: MEDIUM

Options

1. (A) The focal length of the mirror is -30 cm
2. (B) The focal length of the mirror is -20 cm
3. (C) The focal length of the mirror is +15 cm
4. (D) The focal length of the mirror is +10 cm

Verified Answer

Option (B): The focal length of the mirror is -20 cm

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