Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 4 (Q.No. 48)
The power of a lens
is reciprocal of its focal length
is positive if it is a convex lens
is negative if it is a concave lens
is measured in diopter.
Answer: Option
No answer description is available. Let's discuss.
11 comments Page 1 of 2.

Erin said:   1 year ago
All of these are correct, I too agree.

WASEEM SANGI said:   2 years ago
I think Option A is also right.

DEEPIKA said:   3 years ago
Yes, Thanks @Amjad Ali.

Komal said:   3 years ago
Yes, Agree with you @Amjad Ali.

Amjad Ali said:   4 years ago
All these options are correct.

Lalit said:   4 years ago
The focal length f is positive for converging lenses and negative for diverging lenses. The reciprocal of the focal length, 1/f, is the optical power of the lens. If the focal length is in meters, this gives the optical power in dioptres (inverse meters).

Hardik said:   5 years ago
Yes, A is also correct.

Dutesh said:   5 years ago
Yes, A is the correct option.

KULDIP said:   5 years ago
A is also a right answer.

Nayan said:   6 years ago
According to me, it is Both A and D.

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