1. There are 7 different types of electromagnetic wave. Can you guess them…?

2. Television & radio signals, remote controlled toys, "walkie talkies". Heating food, mobile telephones, wireless internet, bluetooth. Remote controls, cooking food, warm objects, fires, heaters, thermal imaging. Security markers, forensic science, forgery detection, the Sun, sun-beds. Candles, torches, LEDs, lightbulbs, illumination, lasers, optics, vision. Broken bones, airport luggage scans. Nuclear radiation, mutations, The Incredible Hulk.

3. Television & radio signals, remote controlled toys, "walkie talkies". Heating food mobile telephones, wireless internet, bluetooth. Remote controls, cooking food, warm objects, fires, heaters, thermal imaging.

4. Security markers, forensic science, forgery detection, the Sun, sun-beds. Candles, torches, LEDs, lightbulbs, illumination, lasers, optics, vision. Broken bones, airport luggage scans. Nuclear radiation, mutations, The Incredible Hulk.