Mention for how much duration, image stays on retina.

2

(a)

Why are we able to see the tap water in the glass even though it is colourless?

2

(a)

Black objects appear black. Why?

2

(a)

White light is a combination of which colours?

2

(a)

A banana appears yellow. Why?

2

(a)

Mention, what kind of lens is there in our eyes. Where does it form the image of an object?

2

(a)

What would happen if he threw the light on the mirror along the normal?

2

(a)

Can the reflected rays be further reflected if incident on another mirror?

2

(a)

What kind of lens is thicker in centre?

2

(a)

Draw a labelled sketch of human eye.

2

(a)

Write difference between regular and irregular reflection.

2

(a)

What is a blind spot?

2

(a)

What is Cataract?

2

(a)

What are the functions of eyelids?

2

(a)

What is the comfortable distance to read, for a normal eye? What types of defects can a human eye have?

2

(a)