# The Naked Scientists Forum

### Author Topic: Which electromagnetic wavelength has more energy, and which has more power?  (Read 2058 times)

#### taregg

• Sr. Member
• Posts: 168
##### Which electromagnetic wavelength has more energy, and which has more power?
« on: 30/10/2013 12:56:51 »
which electromagnetic has more energy and the other has more power.........for long waves and short waves  ..
« Last Edit: 01/11/2013 22:15:43 by chris »

#### JP

• Neilep Level Member
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##### Re: which electromagnetic has more energy and the other has more power.........
« Reply #1 on: 30/10/2013 16:00:42 »
For each photon, the energy is proportional to 1/wavelength, so short waves have higher energy photons.  The power delivered by a wave depends on how many photons it transmits per second, which can vary.  A low wavelength wave with many photons/second can deliver more energy than a high wavelength wave with only a small number of photons/second.

#### taregg

• Sr. Member
• Posts: 168
##### Re: which electromagnetic has more energy and the other has more power.........
« Reply #2 on: 30/10/2013 22:02:08 »
like if we have ultraviolt laser and microwave laser.....which one has more power....if ultraviolt has short wave and microwave has long wave..

#### JP

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##### Re: which electromagnetic has more energy and the other has more power.........
« Reply #3 on: 30/10/2013 23:22:02 »
Lasers, like light bulbs in your house, can run at different powers.  A 10 mW microwave laser has the same power as a 10 mW ultraviolet laser.

#### Supercryptid

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##### Re: which electromagnetic has more energy and the other has more power.........
« Reply #4 on: 01/11/2013 20:29:32 »

#### evan_au

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##### Re: which electromagnetic has more energy and the other has more power.........
« Reply #5 on: 01/11/2013 20:52:58 »
A photon with long wavelength carries less energy than a photon with short wavelength.

Two lasers with the same optical power will deliver the same amount of energy every second, but the one with longer wavelength delivers more photons per second, so the total energy is the same.

#### The Naked Scientists Forum

##### Re: which electromagnetic has more energy and the other has more power.........
« Reply #5 on: 01/11/2013 20:52:58 »