Electromagnetic radiation

electromagnetic radiation

is dual nature

what the 2 natures of electromagnetic radiation

wave and particle nature

electromagnetic waves

are produced by accelerating electrical charges which produce a changing magnetic field and a changing electrical field that vibrate perpendicular to each other

wind nature

diffraction, interference and polarization

diffraction

bending of waves around a barrier

interference

takes place when two waves interact

polarization

is the deafening of wave vibrating in certain planes

particle nature

photo-electric effect

photon

a packet of energy found in light

EM Radiation

transfers energy

speed of electromagnetic waves

3×10_⁸ m.s^-1

speed of sound

343m.s^-1

speed of light

3×10_⁸ m.s^-1

formula for electro magnetic waves

c = frequency x wavelength

electromagnetic spectrum

radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays

gamma rays

high frequency, high energy, short wavelength, kills bacteria and sterilizes food

x rays

not good for body, high frequency so high energy

radio waves

low frequency so low energy

visible light

reflects off the body

ultra violet

damage skin

x-rays penetrating ability

able to penetrate through skin and bone and can lead to cell damage and cancer

UVA & UVB

damage collagen fibers

UVA

can lead to DNA damage and possible skin cancer

UVB

can damage eyes and may lead to cataracts and other medical issues