Xander says: 'The greater an electromagnetic wave's frequency, the more energy it carries.' Is Xander correct?
Bodhi aims two small lights at the same wall: a red laser pointer and an ultraviolet lamp. In the photon model, both send lumps. Are the two kinds of lump equal?
You have seen that higher-frequency electromagnetic waves carry more energy. This lesson sharpens the beam-level fact to the energy carried per photon.
Compare one ultraviolet photon with one red-light photon. Ultraviolet light has the higher of the two frequencies.
The ultraviolet photon carries more energy than the red-light photon.
Raising the light's frequency raises the energy of each photon.
Proportional means the two rise in step. Double the frequency, and each photon's energy doubles.
This is a fact about single lumps, not whole beams. A whole beam's energy each second also depends on how many photons arrive, and that is a separate dial, taken up later in this topic.
Across the spectrum the rule reads one way: of any two photons, the one from higher-frequency light carries more energy.
One ultraviolet photon and one red-light photon fly toward the same wall. Which delivers more energy when it lands?
Ultraviolet light has a higher frequency than red light.
A photon's energy rises with the light's frequency.
So the ultraviolet photon carries the bigger lump.
The ultraviolet photon delivers more energy.
A green beam and an orange beam are equally faint. Which beam's individual photons carry more energy?
Brightness is not the question: the ask is energy per photon.
Green light has a higher frequency than orange light.
Energy per photon follows frequency.
The green beam's photons each carry more energy, even though the beams are equally faint.
Violet light has a higher frequency than orange light. Which carries more energy: one violet photon or one orange photon?
A light source is changed so its frequency doubles. What happens to the energy of each photon it sends?
Gwenno says: 'One ultraviolet photon carries more energy than one red-light photon.' Is Gwenno correct?
Which statement says how a photon's energy depends on its light?
A blue beam is much dimmer than a red beam beside it. Which beam's individual photons carry more energy?
Hamish's lamp sends light with twice the frequency of Farid's lamp. How does the energy of one of Hamish's photons compare with one of Farid's?