Yr7 P3.4 The camera and the eye

What part of the eye controls the size of the pupil?

• Retina

• Iris

• Cornea

What part of the eye focuses the light onto the retina?

• Optic nerve

• Iris

• Cornea and lens

What type of reaction takes place in the retina?

• Physical

• Electrical

• Chemical

What is the image formed on the retina like?

• Real and upright

• Real and inverted

• Virtual and upright

Which part of the eye sends signals to the brain?

• Retina

• Pupil

• Optic nerve

What is the photosensitive grid at the back of a digital camera called?

• LED display

• Charge-coupled device (CCD)

• Light-sensitive lens

How is a pinhole camera similar to the human eye?

• It has a brain to process images

• It uses a lens to reflect light

• It forms a real image on a screen like the retina

Which two types of photoreceptor cells are found in the retina?

• Rods and pixels

• Rods and cones

• Cones and mirrors

Why is the image on the retina inverted?

• The retina bends the light

• The lens focuses light through a pinhole

• The light rays cross when focused through the lens

How is a phone camera different from a pinhole camera?

• It has a larger pinhole

• It doesn't form images

• It uses a sensor grid and stores images digitally