Grade 8 - Camera and Eyes

What is the function of sensor in a digital camera?

• stops the light hitting it.

• detects light falling on it.

• adjusts the amount of light that enters into camera.

How sensor can detect light falling on it?

• energy transferred by light causes electrical changes.

• the lens focuses the light.

• aperture changes in size.

What happens to the light that passes through cornea?

• it gets reflected.

• it gets shattered.

• it gets refracted.

what is the function of iris in the eye?

• it detect colours.

• it focuses the light.

• it controls the size of pupil.

why pupil gets smaller in bright light?

• to get as much light as possible.

• to prevent damaged to eye due to bright light.

• to make sure light gets refracted.

The image formed on the retina is _____________

• upside

• upside down

• rotated at 90 degrees angle.

The transparent covering of eye is called ___________.

• pupil

• iris

• cornea

Which part of the camera focuses light?

• sensor

• shutter

• lens

special cells in the retina change the light energy into electrical impulses called ___________

• optic impulses

• nerve impulses

• connective impulses

Nerve impulses are sent to the brain along the _____________

• optic nerve

• nasal nerve

• pulmonary nerve