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Ravi is given lenses with power …

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Ravi is given lenses with power +5d, -5d, +10d, -10d and -20d. Considering a pair of lenses at a time, which two lenses will he select to have a combination of total focal length when two lenses are kept in contact in each case. 1. -10cm. 2. 20cm. 3. -20cm.

Posted by Yash Singh Bharara 5 months, 3 weeks ago

CBSE > Class 10 > Science

1 answers

Parul Ailawadi 5 months, 1 week ago

1. Don't know 2. -5d, +10d P=-5+10=5d f=100/P=100/5=20cm 3. +5d, -10d P=+5-10=-5d f=100/P=100/-5=-20cm

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CBSE > Class 10 > Science