Year 8 Light

Which term is used to describe height of a wave?

• amplitude

• wavelength

• peak

• trough

True or false:

Wavelength can be described as the distance between two peaks/crests.

• true

• false

Which term describes the number of waves that pass a certain point each second?

• amplitude

• wavelength

• frequency

Complete:

The ___ of incidence equals the angle of ___.

• frequency, reflection

• reflection, incidence

• angle, reflection

• angle, incidence

Which term is given to the change of direction of light rays when they passes into a more dense or less dense medium [such as a solid, liquid or gas]?

• reflection

• refraction

• dispersion

True or false:

An example of a luminous object is the moon.

• true

• false

True or false:

Refraction of white light splits it into its separate colours.

• true

• false

True or false:

Light can travel through a vacuum.

• true

• false

Does light travel faster or slower in glass than air?

• faster

• slower

When white light is shone at a blue filter, only blue light passes through it because all of the other colours are ___.

• reflected

• refracted

• absorbed