Light and the eye KS3

Light travels... (select 2 answers)

• Around corners

• In straight lines

• Faster in glass than in air

• Faster than sound

What are the mistakes in the image? Select 2 answers.

• The arrow on the light ray is going towards the person's eye

• The arrow on the light ray is going away from the person's eye

• The arrow on the light ray is going towards the light source

• The arrow on the light ray is going away from the light source

When drawing ray diagrams, you need to...

• Use a ruler

• Use a pencil

• Have no gaps in the light rays

• Put an arrow to show the direction the light ray is travelling

Which statement is true of sound waves. Select 2 answers.

• They are made by objects vibrating

• They are detected because they make our ear drum vibrate

• They are transverse waves

• They travel faster in air than in water.

What type of wave is shown by the diagram?

• Transverse

• Longitudinal

Light and water waves are examples of what?

• Transverse waves

• Longitudinal waves

What word describes the distance between the middle line and the highest part of the wave?

• Wavelength

• Amplitude

• Frequency

What is the part of the eye that is coloured?

• Cornea

• Lens

• Iris

• Retina

What is the the photo-sensitive part of the eye called?

• Lens

• Iris

• Cornea

• Retina

Light travels in a straight line.

• true

• false