Physics
The focal length of a lens is (i) positive, (ii) negative. In each case, state the kind of lens.
Refraction Lens
25 Likes
Answer
(i) When the focal length of a lens is positive, then the lens is a convex lens.
(ii) When the focal length of a lens is negative, then the lens is a concave lens.
Answered By
16 Likes
Related Questions
Linear magnification m is given by :
- m = vu
- m = -
- m =
- m =
The power of a concave lens of focal length 20 cm is :
- 5D
- 10D
- -10D
- -5D
What information about the nature of the image (i) real or virtual, (ii) erect or inverted, do you get from the sign of magnification + or - ?
How is the power of a lens related to its focal length ?