Which glass is used for making lens?

Which glass is used for making lens?
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1 Answer

Answer :

Flint glass
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What type of lens is a magnifying glass?

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In a magnifying glass ______ lens is used.

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In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is (A) 5.24 cm (B) 6.24 cm (C) 7.24 cm (D) 8.24 cm

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