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

Question

A real, inverted image is formed at a distance of 30 cm in front of a concave mirror when an object is placed 60 cm from the mirror. Which statement best describes the focal length of the mirror? — Exam MCQ

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A. The focal length of the mirror is - 20 cm — The correct choice is The focal length of the mirror is - 20 cm. It follows from the laws of reflection/refraction and the standard image-formation properties of lenses, mirrors or optical systems.

rrbjepyq.in · Answer

B. The focal length of the mirror is + 15 cm

rrbjepyq.in · Answer

C. The focal length of the mirror is - 30 cm

rrbjepyq.in · Answer

D. The focal length of the mirror is + 10 cm

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

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