Question

The film of the camera is compared to which part of the human eye?
(A) Lens
(B) Retina
(C) Iris
(D) Choroid

Answer 1

Hint
The film of a camera is used to record the image based on the light falling on it while capturing the photos. Human eye works as a camera. In the eye we have retina on which image formation takes place. Formation of image on retina is similar to image formation with convex lens.

Complete step by step answer
The Camera and human eye are very much closely related and have many things in common from their basic construction to the working principle. It will be easier to describe each of the main parts of the human eye and compare with that of a camera.
So, when we consider the Cornea of the human eye which can also be called the ‘cap’ of the eye, it is much more related to the lens of a camera. Both are transparent and have a curvature which helps to capture the light, allow refraction and get passed into the eye or camera.

Retina in a human eye is situated at the back side of the eye and collects the light from the surroundings to form the image. Similarly, in the case of a camera, the light is collected on to a camera film or the optical sensors in the case of a digital camera, for forming the image.
The iris of the eye can be compared with the aperture in the case of a camera. In the human eye, the iris contracts and widens itself to control the exposure at different situations. The same purpose an aperture has in a camera. The aperture size decides ultimately how much light has to fall on the film or the sensor.
Choroid, situated just behind the retina, is the connective tissue which contains blood capillaries. So from this comparison, we understand that the film of a camera can be compared with the retina of the human eye.
Hence, the correct answer is option (B) i.e., retina.

Note
This comparison will be more meaningful if we can understand the working of both the camera and the human eye. Then we will be able to appreciate how human eye anatomy and the optics behind it would have inspired physicists and engineers to develop the camera technology.