A long sighted person needs a convex len...

A long sighted person needs a convex lens of focal length +40cm. The power of the lens is :

A

-40 D

B

-2.5 D

C

+2.5 D

D

+40 D

Text Solution

Verified by Experts

The correct Answer is:

C

Promotional Banner

Promotional Banner

Recommended Questions

A long sighted person needs a convex lens of focal length +40cm. The p...
Text Solution
|
A convex lens of power 2 D and a concave lens of focal length 40cm are...
Text Solution
|
A convex lens of focal length 40cm is in contact with a concave lens ...
Text Solution
|
A convex lens of focal length 0.5 m and concave lens of focal length 1...
Text Solution
|
The power of a convex lens of focal length 25 cm is …………… .
Text Solution
|
A convex lens of Focal length of 40cm is in contact with a concave len...
Text Solution
|
A convex lens whose focal length is 40cm, then the power of this lens ...
Text Solution
|
An eye specialist prescribes spectacles having a combination of a conv...
Text Solution
|
The focal length of a convex lens is 20 cm.What is the power?
Text Solution
|