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P1 foundatio n. House Insulation Methods. How many can you name?. Uses. V. IR. R. M. UV. G. X. Long frequency Low . wavelength High energy. Dangers. No dangers. most dangerous. least. Uses. Taking pictures of bones. Cooking food and mobiles.

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House insulation methods

House Insulation Methods

How many can you name?


Uses

V

IR

R

M

UV

G

X

Long

frequency

Low

wavelength

High

energy

Dangers

No dangers

most dangerous

least


Uses

Taking pictures of bones

Cooking food and mobiles

Remote controls and thermal imaging

Sun beds, fluorescent tubing, security marking

Killing cancer cells, sterilising hospital equipment

Seeing, optical fibres

Transmits information over radios

Infra-red

Visible

Radiowaves

Microwaves

Ultra-violet

Gamma rays

X-ray

Long wavelength

Low frequency

Low energy

Long wavelength

High frequency

High energy

Dangers

Even low doses can kill healthy cells

Can burn skin over time

Can damage eyes if too intense

High doses can kill healthy cells

Burns skin, can cause skin cancer

Heating water in tissue – can burn




Energy = mass x SHC x change in temp

transferred


Uses

V

IR

R

M

UV

G

X

Long

frequency

Low

wavelength

High

energy

Dangers

No dangers

most dangerous

least


Uses

Taking pictures of bones

Cooking food and mobiles

Remote controls and thermal imaging

Sun beds, fluorescent tubing, security marking

Killing cancer cells, sterilising hospital equipment

Seeing, optical fibres

Transmits information over radios

Infra-red

Visible

Radiowaves

Microwaves

Ultra-violet

Gamma rays

X-ray

Long wavelength

Low frequency

Low energy

Long wavelength

High frequency

High energy

Dangers

Even low doses can kill healthy cells

Can burn skin over time

Can damage eyes if too intense

High doses can kill healthy cells

Burns skin, can cause skin cancer

Heating water in tissue – can burn



Meteor

Meteor

http://www.youtube.com/watch?v=OGbgt5bN-g0



Red shift and big bang

Red shift and big bang

http://www.youtube.com/watch?v=U-OUP_mXMCw


Red shift and big bang1
Red shift and big bang

We know the universe is expanding because of the Doppler effect. You may have noticed that when an ambulance or police car goes past, its siren is high-pitched as it comes towards you, then becomes low-pitched as it goes away. This effect, where there is a change in frequency and wavelength, is called the Doppler effect and it doesn't only happen with sound.We can see it happening with light when we look at distant stars. The light is being stretched towards the red end of the spectrum because the object is moving away from us, just as it was with the police car. Evidence for this is shown by the location of these black lines in the spectrum of our Sun and in other stars. The black lines are where different elements such as helium absorb light. They are shifted towards the red end of the spectrum because of the Doppler effect. But be careful, just because things moving away from us are shifted towards the red end of the spectrum, doesn't mean they necessarily look red, they just have a longer wavelength.