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Drifter said:I'm not sure how "more photons" would not change frequency. If light is a stream of photons then increasing the number of photons over a given period of time would increase the frequency of photons striking or passing an object, wouldn't it? What else could frequency mean if we are talking about particles instead of waves?
Thinking of light as particles, the "frequency" is the energy content of each individual photon. If you think of them like projectiles, it's the same as increasing the mass of each projectile. Since you mentioned thinking of physical entities mainly as waves rather than particles, you've probably heard of the de Broglie relations which can express the energy of (all) particles in terms of frequency.
In general photons do not arrive in regularly-spaced intervals, and this is not what defines the frequency of light. If you'd like to prove it to yourself, shine two laser pointers of the same color at the same spot, and note that the point of light created is still the same color (the frequency hasn't changed) even though the number of photons arriving per second should now be doubled. Instead, the spot is just brighter than if only one laser were used.
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