Science, asked by Surbhiss, 1 year ago

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is
a)-6.5D
b)+6.5D
c)+6.67D
d)-1.5D

Answers

Answered by Satyamrajput
12
Heya!!

P1= 100/40= 2.5D

P2= -100/25= -4D

So, P= P1+P2= 2.5D-4D= -1.5D

Hence, (D)-1.5 is the right answer

Hope it helps✌️✌️

Surbhiss: thanks
ammu1234562: hii
Answered by Anonymous
7
Heya Friend !!

Please view the solution in the attachment .

Hence , option d) is the correct answer .
Attachments:
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