# Electromagnetic Radiation in Relation to photons

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• Created on: 13-10-15 12:38
Name, in acsending order of frequency, all electromagnetic waves
Radiowaves, Microwaves,Infra-red, Visible light, Ultraviolet, X rays,Gamma
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The higher the frequency of electromagnetic radiation, the greater its...
energy
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What was the name of the scientist who came up with Plancks Constant?
Max Planck
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What was he studying at the time?
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What did Planck propose?
That Em waves only existed in discrete packets called quanta
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How did Einstein extend Planck's theory ?
He suggested that EM waves AND the energy they carried only existed in discrete packets
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What did Einstein call discrete packets?
Photons
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Give the equation for the energy of one photon
E=hf
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What is energy measured in?
Joules
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What is frequency measured in?
Hz
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What is Planck's constant measured in?
Js or Joules per second
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What is Plancks constant?
6.63*10^-34
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Give the equation that relates frequency to wavelength and the speed of light
f=c/ƛ
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What is wavelength measured in?
Metres
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What is frequency measured in?
herz
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What is the speed of light measured in?
ms^-1
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What is the number for the speed of light?
3*10^8
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Give an another equation for finding the energy of a photon
E=hf=hC/ƛ
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What is the difference between a particle and an antiparticle?
An antiparticle has a different charge
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What is the same between a particle and an anti particle?
The rest energy, the mass
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If all particles are known as matter then all antiparticles are known as...
Antimatter
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What is the difference between the symbol for a particle and the symbol for an antiparticle?
An antiparticle symbol has a line across the top
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## Other cards in this set

### Card 2

#### Front

The higher the frequency of electromagnetic radiation, the greater its...

energy

### Card 3

#### Front

What was the name of the scientist who came up with Plancks Constant?

### Card 4

#### Front

What was he studying at the time?

### Card 5

#### Front

What did Planck propose?