A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

May 2, 2022

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A 10 mm long awl pin is placed vertically in front of a concave mirror

Q. A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

A. -30 cm

B. -20 cm

C. -40cm

D. -60 cm

Answer: -20 cm

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

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Which of the following can make a parallel beam of light when light from a point source is incident on it?

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

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Under which of the following conditions a concave mirror can form an image larger than the actual object?

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