Q8. (a) Visible light is used for communications. Which other parts of the electromagnetic spectrum are used for communications? Tick ( ) two boxes. Gamma rays Microwaves Radio waves Unraiviolet X-rays (2) OThe diagram below shows a ray of light in an optical fibre. made of optical fitre (b) What is the name given to the dotted line on the diagram? (1) (c) Where the ray of light touches the edge of the optical fibre it is reflected. Draw the reflected ray on the diagram above. (2) (d) Optical fibres need to be able to bend around corners without breaking. Suggest the property that optical fibres must have to allow them to bend around corners. (1)(e) The appearance of visible light can change when it interacts with different objects. Complete the sentences. Choose the answers from the box. Each answer may be used once, more than once or not at all. absorbed reflected refracted transmitted When white light is incident on a green filter, only green light passes through the filter. This is because green light is by the filter. All other colours of light are by the filter. When red light shines on a blue object the red light is (3) (Total 9 marks)