Understanding Human Vision and Light

Luminous objects can emit light on their own.

Regular reflection occurs when light bounces back in a scattered manner.

Diffused reflection occurs when light is reflected in a predictable manner.

Light is necessary to illuminate objects and make them visible.

A polished surface can act as a mirror and change the direction of light.

We can see objects in the dark without any light.

Diffused reflection occurs when light reflects from a smooth surface.

The moon is an example of a luminous object.

There are two types of reflection: regular and diffused.

Regular reflection does not form images.

The sun is an example of an illuminated object.

Reflected light cannot be reflected again if incident on another mirror.

The eyes of a crab are shaped to enable it to look only in the front direction

Butterflies have small eyes that can only see in the front direction

A night bird like an owl can see very well during the day

The owl has a small cornea and a small pupil to allow less light in its eye

Day birds have more rods and fewer cones in their retina

A deficiency of vitamin A in food can cause eye problems