This question is about electromagnetic waves and their interactions with materials.
Visible light and infrared are extensively used to transmit data through glass cables. State one other region of the electromagnetic spectrum that is widely used for sending television and radio broadcast signals through the atmosphere.
The diagram shows an incident ray of light hitting the boundary between glass and air.
State the scientific name given to the imaginary dashed line drawn at a right angle to the boundary.
Complete the sentences below describing what happens when white light is incident on a green colour filter.
Choose your answers from the following list of terms:
- absorbed
- reflected
- refracted
- transmitted
(i) Green light is detected on the other side of the filter because it is _________ by the filter.
(ii) Red light is not detected on the other side because it is _________ by the filter.