If the magnification produced by a lens is – 0.5, the correct statement is :
(a) The lens is concave
(b) The image is virtual
(c) The image is magnified
(d) The images are real and diminished formed by a convex
Solution:
The correct option is (d).
The image is real and diminished as formed by a convex lens. This is because the negative sign of magnification implies that the image is real while the value of magnification (o.5) indicates that the image is diminished. Height of the image is half the height of object.
What is the nature of the image formed by a convex lens if the magnification produced by the lens is, – 0.5?
If the magnification produced by the lens is -0.5, the image will be real and inverted. It is because if the magnification produced by a lens has a negative value, the image is always real and inverted.
Concept: Linear Magnification (M) Due to Spherical Mirrors
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AcademicPhysicsNCERTClass 10
If the magnification produced by the lens is $-$0.5, the image will be real and inverted, since the magnification has a negative $(-)$ value.
Explanation
If the magnification $m$ has a positive $(+)$ value, the image will be virtual and erect. And, if the magnification $m$ has a negative $(-)$ value, the image will be real and inverted.
Since a convex lens can form virtual images as well as real images, therefore the magnification produced by a convex lens can be either negative $(-)$ or positive $(+)$.
While a concave lens, forms only virtual images, so the magnification produced by a concave lens is always positive $(+)$.
Updated on 10-Oct-2022 10:51:47