wave speed, v, in metres per second, m/s frequency, f, in Hertz, Hz wavelength, in λ, metres, m 4.1.4.3 Electromagnetic Recall that electromagnetic 1 Describe the properties of all Where are waves form a waves are transverse, are electromagnetic electromagnetic waves continuous spectrum. transmitted through space used? State that electromagnetic Teachit Science where all have the same Examples of uses of waves transfer energy from Why are resource (19928) velocity, and explain, with electromagnetic waves one place to an absorber of electromagnetic waves examples, that they transfer include: that energy. used when they are ‘Electromagnetic energy from source to radiation what does dangerous? – waves – Give the of the absorber. what?’ television and radio electromagnetic spectrum. Research the various Recall that light is an and radio uses of electromagnetic Describe uses of each wave in electromagnetic wave. telescopes waves and how they are the electromagnetic spectrum. microwaves Describe the main groupings suitable for that – Explain the suitability of each satellite of the spectrum radio, application. – wave for its practical communications, microwave, infrared, visible Required practical 6: application. cooking food (red to violet), ultraviolet, investigate how the infrared electrical and gamma rays, that amount of infrared – Suggest reasons why an these range from long to radiation absorbed or heaters, cooking electromagnetic wave may not radiated by short wavelengths and from low to high frequencies, and
wave speed, v, in metres per second, m/s frequency, f, in Hertz, Hz wavelength, λ, in metres, m 4.1.4.3 Electromagnetic waves form a continuous spectrum. Examples of uses of electromagnetic waves include: waves – television and radio and radio telescopes microwaves – satellite communications, cooking food infrared – electrical heaters, cooking Recall that electromagnetic waves are transverse, are transmitted through space where all have the same velocity, and explain, with examples, that they transfer energy from source to absorber. Recall that light is an electromagnetic wave. Describe the main groupings of the spectrum – radio, microwave, infrared, visible (red to violet), ultraviolet, and gamma rays, that these range from long to short wavelengths and from low to high frequencies, and 1 Describe the properties of all electromagnetic State that electromagnetic waves transfer energy from one place to an absorber of that energy. Give the of the electromagnetic spectrum. Describe uses of each wave in the electromagnetic spectrum. Explain the suitability of each wave for its practical application. Suggest reasons why an electromagnetic wave may not Where are electromagnetic waves used? Why are electromagnetic waves used when they are dangerous? Research the various uses of electromagnetic waves and how they are suitable for that application. Required practical 6: investigate how the amount of infrared radiation absorbed or radiated by Teachit Science resource (19928) ‘Electromagnetic radiation – what does what?’