lifht and electromagnetic spectrum 2

inverse proportion

wavelength and frequency are inversely proportional as wavelength decreases and frequency increase

ionising vs non ionising

high frequency waves carry enough photon energy to ionise atoms and damage living tissue whereas lower frequencies are non ionising

em waves

absorbed or generated when energy changes occur within atoms

em waves and atoms

electron orbits: when atoms absorb em waves their electrons gain energy and move to higher unstable orbits sometimes nuclear changes inside of the nucleus of an unstable atom during radioactive decay releases massive amounts of nuclear energy

dangers of microwaves

high intensity can cause internal heating of cells

dangers of infared

serious skin burns

dangers of visible light

retina damage

ultra violet dangers

sunburn aging and skin cancer

dangers of x rays

cell mutation and internal cancer

gamma rays danger

dna mutations cell death and cancer

reception with radio waves

abdsorption forces electrons in the receiver to move generating an alternating current with the exact same frequency

production of radio waves

alternating current oscillate inside an electrical current . these oscillations create ripple waves in the surrounding electric magnetic fields

ionisation

high frequency waves carry enough localised energy to knock electrons out of atoms altering the materials chemical structure

resonant absorption

water molecules absorb microwaves efficiently increasing their kinetic energy to heat food .