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

Offline taregg

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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 »


 

Offline JP

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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.
 

Offline taregg

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like if we have ultraviolt laser and microwave laser.....which one has more power....if ultraviolt has short wave and microwave has long wave..
 

Offline JP

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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.
 

Offline Supercryptid

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JP already answered your question: it varies from one laser to another, regardless of wavelength.
 

Offline evan_au

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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.
 

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