Physics
Where should an object be placed in front of a convex lens of focal length 0.12 m to obtain a real image of size three times the size of the object, on the screen?
Related Questions
A concave lens forms the image of an object kept at a distance 20 cm in front of it, at a distance 10 cm on the side of the object.
(a) What is the nature of the image?
(b) Find the focal length of the lens.
The focal length of a convex lens is 25 cm. At what distance from the optical centre of the lens an object be placed to obtain a virtual image of twice the size ?
An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance of 75 cm from the lens.
Find —
(i) the focal length of lens, and
(ii) the magnification.
A lens forms the image of an object placed at a distance 15 cm from it, at a distance 60 cm in front of it.
Find —
(i) the focal length,
(ii) the magnification, and
(iii) the nature of image.