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Radiation and Life

Revision for January 2011

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Electromagnetic Spectrum

This is the name for the family of waves that all behave like visible light. Learn

• the order

•which are ionising

•some effects on life

•some uses

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Electromagnetic Spectrum

ADIO

Learn the OrderR

ICROWAVE

MNFRARED

IISIBLE

VLTRAVIOLET

URAY

XAMMA

G

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Robbie Makes It Vibrate...

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... Using X-rated Goods

X rated

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Electromagnetic Spectrum

OBBIE

Robbie makes it vibrate using x-rated goods

RAKES

MT

IIBRATE

VSING

URATED

XOODS

G

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Electromagnetic Spectrum

OBBIE

again...R

AKES

MT

IIBRATE

VSING

URATED

XOODS

G

9

Electromagnetic Spectrum

OBBIE

last time for Robbie...R

AKES

MT

IIBRATE

VSING

URATED

XOODS

G

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Electromagnetic Spectrum

ADIO

Which are ionisingR

ICROWAVE

MNFRARED

IISIBLE

VLTRAVIOLET

URAY

XAMMA

G

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Electromagnetic Spectrum

Ionising radiation• High energy photons

• Can break molecules

• Can damage DNA

• Can cause cancer

Ionising – so what?

LTRAVIOLET

URAY

XAMMA

G

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Animation of breaking molecules?

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Uses of radiationsEmitted by TV remote control

microwave

Emitted by mobile phone when sending a text

Emitted by sun-bed in a tanning studio

Used in hospitals to check for broken bones

visible

X-ray

gamma

???

???

???

radio

infra-red

ultra-violet

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Cause, Correlation, Factor, Outcome

(a) Which two people have taken actions that will reduce the amount of carbon dioxide in the atmosphere?

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Cause, Correlation, Factor, Outcome

(b) Which one person mentions a correlation between a factor and an outcome?

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Cause, Correlation, Factor, Outcome

(c) Which two people have identified possible consequences of global warming?

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Risk and Benefit

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Uses of radiationsUsed to heat foods quickly

radio

microwave

Used to make toast and grill foods

Used to show up security markings

Used to treat cancers

infra-red

visible

???

???

ultra-violet

X-ray

???gamma

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Risks and Benefits

Which two people are taking action to reduce the risks from exposure to ultraviolet?

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Risks and Benefits

Who is talking about the dangers from exposure to ultraviolet? (It could be more than one.)

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Risks and Benefits

Who is talking about the benefits from exposure to ultraviolet? (It could be more than one.)

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Uses of radiationsEmitted by TV remote control

gamma

Used to grill foods and make toast

Emitted by sun-bed in a tanning studio

Used by humans to see with their eyes

radio

???

???

???

???

???

ultra-violet

visible

infra-red

microwave

X-ray

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Risks and Benefits

The article suggests there is a risk to using a mobile phone.

Which two students seem unaware of any risks?

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Risks and Benefits

Which two students have done things that lead to a lower risk?

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Risks and Benefits

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Uses of radiationsHuman eyes can detect this

microwave

Emitted by any warm object

Used to see inside bags in airport security

Used in broadbast TV signals

visible

X-ray

???

???

???

radio

infra-red

ultra-violet

???gamma