Chapter 30, Problem 12A

Which instrument—a telescope, a compound microscope, or a camera—is most similar to the eye?

To determine

To identify: The device similar to our eyes.

Explanation of Solution

Introduction:

Human eyes is the most sensitive part of our body and is most vital organs also as it enables to see the colourful world. It consists a lens and a screen called retina to focus the image of an object around us.

A camera consists of a lens which forms real and inverted image of an object and a short sensitive film. The amount of light entering the sensitive film is controlled by the diaphragm and the shutter. Human eye is also just similar to a camera which consist a convex lens and retina which acts as screen. Light enters the eye with the help of cornea and the amount of light is controlled by the iris. Just similar to a camera, eyes also form a real and inverted image of an object which our brain interprets it to erect. However they both differ in the sense of focussing on an object. In a camera where focussing can be adjusted by adjusting the distance between the lens and the film while in eyes, this focussing is done by cornea.

Conclusion:

Hence, our eyes is similar to a camera.