The Electromagnetic Spectrum Class Quiz 0.0 / 5 ? PhysicsElectromagnetic SpectrumGCSENone Created by: nobleaCreated on: 16-10-15 20:34 What are the seven colours of the visible spectrum? red, orange, yellow, green, blue, indigo, violet 1 of 8 Name the parts of the electromagnetic spectrum, in order, starting with shortest wavelength. Gamma-rays, X-rays, ultra-violet, visible light, infra-red, microwave, radio waves. 2 of 8 What can you say about the speed of these waves? They all travel at the same speed in a vacuum. 3 of 8 Which of these radiations are the most dangerous to us? Gamma-rays, X-rays, ultra-violet, microwaves. 4 of 8 Name some uses of gamma-rays. Kill harmful bacteria in food, sterilize instruments in hospitals, kill cancer cells 5 of 8 Name some uses of infra-red rays. Grills, toasters, remove controls for TVs, burglar alarm sensors. 6 of 8 Name some uses of microwaves. Microwave ovens, mobile phones, satellite communications. 7 of 8 What are the advantages of digital signals (compared to analogue signals)? They are less affected by noise, and are able to carry more information. 8 of 8
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