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MCQ On Reflection And Refraction Of Light With Answers Pdf Question 5. An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is (a) – 30 cm (b) 30 cm (c) – 15 cm (d) +15 cm

MCQ On Reflection And Refraction Of Light With Answers Pdf Question 5. An object at a distance of 30 cm from a
concave mirror gets its image at the same point. The focal length of the mirror is
(a) – 30 cm
(b) 30 cm
(c) – 15 cm
(d) +15 cm

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8741 Points
2 months ago
Answer: c Explanation: (c) When object is placed at 2F, the image formed by concave mirror is also at 2F. So 2F = -30 or F = -15 cm.

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