Advertisements
Advertisements
Question
Ranbir claims to have obtained an image twice the size of the object with a concave lens. Is he correct? Give a reason for your answer.
Solution
No, he is not correct.
Reason: Magnified image of an object cannot be formed by a concave lens ever. Because, no matter where the object is placed in front of a concave lens, it always forms a virtual, erect, and diminished image of the object.
RELATED QUESTIONS
What is meant by a power of a lens? Define its SI unit.
State power of a lens S.I. unit.
Name the physical quantity whose unit is dioptre.
State the condition for the following a ray passes undeviated through the lens .
Mohan obtained a sharp inverted image of a distant tree on the screen placed behind the lens. He then moved the screen and tried to look through the lens in the direction of the object. He would see:
(1) a blurred image on the wall of the laboratory.
(2) an erect image of the tree on the lens.
(3) no image as the screen has been removed
(4) an inverted image of the tree at the focus of the lens.
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
What is meant by the power of accommodation produced?
If there is a convex lens of focal length 75 cm and a concave lens of focal length 40 cm, then calculate their combined power and combined focal length.
The power of convex lens of focal length 20 cm is ______.
The focal length of a double convex lens is equal to the radius of curvature of either surface. What is the refractive index of its material?
