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Light Reflection and Refraction
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10/08/2021 1:18 pm
Topic starter
A concave mirror has a focal length of 25 cm. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror?
(a) 45 cm (b) 20 cm (c) 25 cm (d) 30 cm
Give reason for your choice.
1 Answer
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10/08/2021 1:19 pm
20 cm, because if the object is placed between the pole and focus of the concave mirror only then the image formed is erect and magnified.