Radiation

RADIATION A natural phenomenon you shouldn’t be afraid of!!

SOME QUICK FACTS TO HELP YOU DRIVE OUT YOUR RADIATION FEAR ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Death Risk - Cause Death Risk – 40 Year Old All causes 1 per 500 Smoker –10 a day 1 per 2,000 Road accidents 1 per 5,000 Home accidents 1 per 10,000 Work accidents 1 per 20,000 All radiations 1 per 27,500 Medical Radiations 1 per 240,000

WHAT IS RADIATION? ,[object Object],[object Object],Radiation is everywhere around us.

TYPES OF RADIATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

LOCATION OF THESE RADIATIONS IN THE ELECTROMAGNETIC SPECTRUM ELECTROMAGNETIC SPECTRUM 10 -14 10 -12 10 -10 10 -8 10 -6 10 -4 10 -2 1 10 2 10 4 10 6 10 8 Wavelength in Meters 10 10 10 8 10 6 10 4 10 2 1 10 -2 10 -4 10 -6 10 -8 10 -10 10 -12 10 -14 Broadcast Short wave TV FM Radar Infrared Near Far Visible Ultraviolet X Rays Gamma Rays Cosmic Rays Power Transmission Ionizing Radiation Non-ionizing Radiation Energy - Electron Volts High Low

NON-IONIZING RADIATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Radiant energy of the sun is due to visible light

Ultraviolet radiation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],This image of the sun was taken with a filter which shows radiation only in the extreme ultraviolet (UV) range of the spectrum, shown as blue

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Visible light helps us to see the world around us A cat when seen through an infrared camera

IONIZING RADIATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A diagram showing how ionizing radiations produce ions.

Penetration powers of different radiations Paper Wood Concrete Alpha Beta Gamma Energy Low Medium High

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],This image shows an X-ray image of the hand of wife of W. Roentgen, the discoverer of X-ray.

EFFECTS OF RADIATIONS ON HEALTH ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FREQUENTLY ASKED QUESTIONS ,[object Object],[object Object],[object Object]

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[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Source Annual Dose (  Sv) Radon and thoron gas from rocks and soil 800 Gamma rays from ground 400 Carbon and potassium in your body 370 Cosmic rays at ground level 300 Total = 1870

[object Object],Annual Dose (  Sv) Medical uses – x-rays, etc. 250 Chernobyl 50 Fall-out from weapons testing 10 Job (average) 5 Nuclear industry (e.g. waste) 2 Others (TV, aeroplane trips, etc.) 11 Total = 328

[object Object],[object Object],[object Object],[object Object],The quality factor for each type of radiation is shown below: From this it can be seen that alpha radiation is the most ionising radiation out of the three types. Radiation Quality Factor (Q) Alpha particles 20 Beta particles 1 Gamma rays 1

Radiation

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