Em waves, radiation, mirror

• Wave is a disturbance in space
• frequency refers to the number of waves produced in one second
• range refers to the extent or the limits between which variation is possible
• wave through is the lowest point in wave
• wave crest is the highest point in wave
• amplitude is the vertical distance of wave
• wavelength is the horizontal distance of the wave
• The development of EM wave theory is achieved by scottish physicist, James Clerk Maxwell in 1831-1879
• Many discoveries were made about electricity and magnetism in 19th century
• Coulomb is coulomb's law 1785
• Oersted is oersted's law 1820
• Ampere is ampere's law 1823
• Faraday is electromagnetic induction 1831
• Electromagnetic wave is the disturbance produced by accelerated charges, which cause changing electric and magnetic fields
• v = speed of wave = m/s
• f = frequency of wave = hz
• λ = wavelength of waves = m
• each type of EM wave occupies a range of wavelength known as band
• EM waves do not require a medium
• EM waves can travel through empty space
• EM wave are considered to be transverse wave
• RFID stands for radio frequency id
• MRI stands for magnetic resonance imaging
• Radio waves have the longest wavelengths and lowest frequencies of all EM waves
• Radio waves are easily transmitted through air
• microwaves are referred as short range radio waves
• RADAR stands for radio detection and ranging
• GPS stands for global positioning systems
• Microwaves can pass through the atmosphere
• heat lamps give off infrared waves
• thermogram is a picture that shows regions of different temperatures are calculated by the amount of infrared radiation given off
• refraction - is the change in t he direction of light when it passes from one medium to another of different optical density