Infrared radiation travels at the same speed as light, but it has a lower frequency than red light. State whether its wavelength is greater than or less than of red light.

Complete the table to show the names of each of these aspects of waves.

The figure shows the light waves travelling through two different materials, $1$ and $2$.

Complete the table to show how the speed wavelength and frequency of the waves change as they are travelling from material $1$ into material $2$.