BTEC Applied Science Unit 1 Physics - C Waves in Communication C3 Electromagnetic waves in communication / Btec Applied Science Unit 11 Assignment C Full Assignment

BTEC Applied Science Unit 1 Physics - C Waves in Communication C3 Electromagnetic waves in communication / Btec Applied Science Unit 11 Assignment C Full Assignment What is the electromagnetic spectrum? - ANS-The range of wavelengths or frequencies over which electromagnetic radiation extends. State the order of the electromagnetic spectrum (longest wavelength and lowest frequency -- lowest wavelength and highest frequency). - ANS-Radio waves, microwaves, infrared radiation, visible light, ultraviolet, x-rays, gamma rays Red light has... - ANS-a low frequency and a long wavelength Blue/purple light has... - ANS-a high frequency and a short wavelength Radio waves frequency - ANS-10 ^4 - 10 ^8 Hz Microwaves frequency - ANS-10^10 Hz Infrared frequency - ANS-10^13 Hz Visible light frequency - ANS-10^15 Hz Ultraviolet frequency - ANS-10^16 Hz X-rays frequency - ANS-10^18 Hz Gamma rays' frequency - ANS-10^20 Hz Radio waves - ANS-- Electromagnetic waves with the longest wavelengths and lowest frequencies - Emitted by radio and TV transmitters - Used to send radio and TV programmes - Detected by aerials and radios/TVs Microwaves - ANS-- Emitted by radio transmitters, mobile phones and microwave cookers - Used to carry information and to cook food - Can damage living tissue by heating it - Detected by aerials and radios/mobile phones Infrared radiation - ANS-- Emitted by warm and hot objects, and by TV remote or car locks