Physics
A concave lens forms an erect image of 1/3rd the size of the object which is placed at a distance 30 cm in front of the lens. Find:
(a) The position of the image, and
(b) The focal length of the lens.
Related Questions
An object is placed at a distance of 20 cm in front of a concave lens of focal length 20 cm. Find —
(a) the position of the image, and
(b) the magnification of the image
Express the power (with sign) of a concave lens of focal length 20 cm.
A convex lens forms an inverted image of size same as that of the object which is placed at a distance 60 cm in front of the lens.
Find —
(a) The position of image, and
(b) The focal length of the lens
The power of a lens is +2.0 D. Find its focal length and state what kind of lens it is?