Advertisements
Advertisements
Question
An object is placed in front of a converging lens. Obtain the conditions under which the magnification produced by the lens is
- negative and
- positive.
Advertisements
Solution
- Magnification is negative for the real image formed by a convex lens.
- Magnification is positive for the virtual image formed by a convex lens.
RELATED QUESTIONS
How unit of power related to focal length of a lens?
Find the power of a concave lens of focal length 2m.
Which of the two has a greater power: a lens of short focal length or a lens of large focal length?
A converging lens has focal length of 50 mm. What is the power of the lens?
What is the power of a convex lens lens whose focal length is 80 cm?
A lens has a focal length of, −10 cm. What is the power of the lens and what is its nature?
A convex lens of power 5 D and a concave lens of power 7.5 D are placed in contact with each other. What is the :
(a) power of this combination of lenses?
(b) focal length of this combination of lenses?
A normal eye is not able to see objects closer than 25 cm because
A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4 D, the power of a divided lens will be
Consider the situation described in the previous problem. Where should a point source be placed on the principal axis so that the two images form at the same place?
