Question

Ravi is given with lenses with powers +5 D,- 5D and + 10 D.All the three lenses are in contact.Find the power of the combination of lenses.​

Answer 1

Answer:

Power of the combination of lenses =10cm

Explanation:

when lenses of +5D,-5D and +10 are in contact.

P= P1+P2+P3

P= 5-5+10

P=10D

P=100/10=10cm