Question

The image formed on retina when we see an object is
This question has multiple correct options
A. real
B. virtual
C. erect
D. inverted

Answer 1

Hint: The lens of our eye is a biconvex lens. So, the light ray from the top of an object meets at the retina lower than the ray which comes from the bottom part of the object due to refraction at the biconvex lens.

Complete step by step answer:
Our eye’s lens is a biconvex lens i.e. it has two convex sides.
So, when an object is at a distance greater than the least distance of clear vision, the light rays from the object get refracted through the convex lens and form a real and inverted image at retina.
In other words, the light ray from the top of an object meets at the retina lower than the ray which comes from the bottom part of the object due to refraction at the biconvex lens. So, the image formed at the retina will be real and inverted.
Hence, option A and D are correct.

Note: Although the image formed by the retina is real and inverted, we see the image erect. This happens as the image formed is carried out to our brain through the optic nerves in the form of electrical signals. Thus, our brain processes this signal in such a way that we can see the image erect.
When an object is far away from us, we see a very small size of it but as the same object is brought nearer to our eye, we are able to see the actual size of the object. This happens due the refraction of light rays through our eye lens.