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CBSE Notes 2011-2012

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal l...

Multiple choice question

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

unknown

- 30 cm

unknown

30 cm

unknown

- 15 cm

unknown

+15 cm