Q 2 When a bright object is placed 10 cm away from a concave mirror, its real image is - Science - Light - Reflection and Refraction

Question

Q 2 When a bright object is placed 10 cm away from a concave
mirror, its real image is formed at a distance 40 cm from the
mirror What is the focal length of the mirror?

Decoder_2 · Accepted Answer

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Q.2. When a bright object is placed 10 cm away from a concave mirror, its real image is formed at a distance 40 cm from the mirror. What is the focal length of the mirror?