The EM SpectrumGamma rays

X-ra

ysU

ltrav

iole

t

Visible

Infr

a-re

dM

icro

wav

esRa

dio

Wav

elen

gth

size

com

paris

on

Can

pene

trat

e a

tmos

pher

e?

Absorb

Reflect

Emit

Transmit

Penetrate

Ener

gy

Freq

uenc

y

Wav

elen

gth

Waves (Definitions of Frequency/Wavelength/Wave equation/amplitude)

Ionisation/How this

causes cancer

Skins Protection

Radiotherapy

Ionosphere

Heating and Absorption (Applies to all EM Waves but questions mainly on Microwaves

and Infra-Red)

Alternating Current/Voltage (Aerials etc)

How EM waves interact with matter

Annotate me...

Optical Fibres

Fluorescence

X-Ray Photographs

Sterilisation/Kill Harmful Bacteria

Infra-Red Cameras

Mobile Phones (Infra-Red, Bluetooth, Making calls etc)

Satellite Communication

International Radio

Analogue and Digital signals (How waves used for communication can be sent)

Oth

er In

fo

Use

d In

Med

icin

eU

sed

mai

nly

for c

omm

unic

ation

Use

d to

hea

t thi

ngs

up

Local Radio and TV

Prefixesnano (n) - 10-9 – 0.000000001

micro (µ) - 10-6 – 0.000001milli (m) - 10-3 – 0.001

kilo (k) - 103 – 1000Mega (M) - 106 – 1000000

Giga (G) - 109 – 1000000000

Centi (c) – 10-2 – 100

12 km = 12000m15cm = 0.15m

700nm = 7.0 x 10-7 mYou don’t really need to know

the small ones like milli and micro but it helps....

Info

that

can

be

sent

D

amag

e to

hum

an ti

ssue

Det

ecto

rs

Sour

ces

EM Waves Interaction with Matter

Wave Basics

Prefixes

Gamma Rays

Radiotherapy

Sterilisation of surgical instruments and killing bacteria in food

X-Rays

X-Ray Photographs

Medical Physics

Ultraviolet

Flourescence

Sun tans and melanin

Ionisation of atoms

Cancer

Communications

Visible Light

Infra-Red

Infra-Red Cameras

Optical Fibres

Microwaves

Mobile Phones

Heat Transfer using EM Waves

Radiowaves

Satellite Communications

Local Radio and TV

International Radio

The Ionosphere

Aerials and Alternating Currents

Analogue and Digital Signalling