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Two thin lenses of power plus 3.5 d and minus 2.5 d are placed in contact. Find the power and focal length of the the lens combination

Posted by Preeti Senapati 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Rohit Kumar 5 years, 2 months ago

• power of combination =3.5+(-2.5)=1d •Power =1/focal length (m) 1=1/f f=1/1 f=1m or 100cm

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Riya Philip 5 years, 2 months ago

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CBSE > Class 10 > Mathematics