Understanding the Eye and Light

What is the black circular part at the centre of a person’s eye called?

• Iris

• Pupil

• Retina

• Lens

What is the coloured ring around the pupil called?

• Retina

• Cornea

• Iris

• Lens

What happens to the iris when a person is in very bright light?

• The area of the iris decreases

• The area of the iris increases

• The pupil becomes larger

• The retina moves

What happens to the pupil when a person is in a place with little light?

• The pupil becomes smaller

• The pupil becomes larger

• The iris disappears

• The retina shrinks

Where is the image formed in the eye?

• On the iris

• On the pupil

• On the retina

• On the cornea

Why do we see luminous objects?

• They reflect light

• They emit light

• They absorb light

• They block light

Why do we see non-luminous objects?

• They emit light

• They reflect light

• They absorb light

• They block light

What is the function of the pupil in the eye?

• To change the colour of the eye

• To allow light to enter the eye

• To form images

• To protect the eye

What is the light-sensitive region at the rear of the inside of the eye called?

• Iris

• Pupil

• Retina

• Cornea

What is formed on the retina when light enters the eye?

• A sound

• A shadow

• An image

• A reflection