y voilet light has more energy than white light ?

Question

as every body knows that voilet light has more energy than white light bt why. most common answer given is that white light is average of all colours but if it is so this means that its a single wave by superimposition principle but if it's single wave then why prism splits it?! plz try out this

Answer 1

Even if you have a signal that is a superposition of many frequencies, you can still separate out the components of different frequencies--the faster components will propagate at a different speed from the slower ones through a dispersive medium (like the glass in a prism), so they'll refract differently.



It may seem to you that superposition would turn the frequencies into an indecipherable muddle. But the muddle can be unmuddled. Your ear or your eye (or various electronic mechanisms) can act like fourier transformers and un-superpose it.



You may find it simpler to understand this in terms of light being a particle phenomenon--a bunch of photons. Indeed, if you are saying that violet has more energy, you have to. Violet has more energy PER PHOTON, not necessarily more overall. Your microwave oven puts a lot more energy into microwaves than it does into the light from the little bulb, even though the microwave photons are individually much less potent than the visible ones.

Answer 2

White light is not a single wave. If you take white light to be composed of the 7 rainbow colours, then you have a chance of 6 in 7 that a photon will not be a violet one. Therefore, the energy is, let's say, diluted, because of the presence of other photons.



In short, there is less energy per equal quantity of photons in white light than there is in pure violet light.

Answer 3

White light actually has more energy than violet light due to all of the constituents superimposed...



Prism splits these constituents of light up because each colour ( red - violet) has a different frequency and thus refractive index.

Answer 4

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Answer 5

You are misinterpreting the superposition principle. If I play two notes on a piano at two different frequencies, you hear both notes. They aren't combined into a single note.