The photon doesn't have a figure one can relate to. We can't say a photon looks like this -- or like that, because there's nothing in the world we see with our eyes day by day that looks like a photon.
There is no way to "see" a photon, so we cannot describe what it looks like. And because the photon exhibits what is called wave-particle duality, it can be considered as either a particle or a wave depending on what method we use to observe them. As regards the photon, we cannot "pin it down" to being either a particle or wave. Use the links below for more information.
You can't look at a photon passing by and say "There it is !".
But when a photon enters your eye and gets absorbed in the
retina at the back of your eye, you know it, as long as its
wavelength is in the visible range.
(Actually, your eye isn't sensitive enough to know about one
single photon. It takes a few million or trillion of them, but the
idea is the same.)
infrared
Wavelength, Frequency, or Photon Energy
UV has higher energy (per photon) than visible light.
A photon's energy is directly proportional to its frequency (inversely proportional to its wavelength).In any given interval of the spectrum, the highest frequency (shortest wavelength) carries the most energy.For visible light, that corresponds to the violet end of the 'rainbow'. The last color your eyes can perceiveat that end is the color with the most energy per photon.
Each photon of blue light has more energy than a photon of any other color, because the blue ones have the highest frequency.
infrared
Wavelength, Frequency, or Photon Energy
UV has higher energy (per photon) than visible light.
A photon.
A photon is 'visible' once and only once. That's when it flies into your eye and gets absorbed by the receptors in the back of your eye. If it gets absorbed by something else before it reaches your eye, then you'll never see that photon.
A photon's energy is directly proportional to its frequency (inversely proportional to its wavelength).In any given interval of the spectrum, the highest frequency (shortest wavelength) carries the most energy.For visible light, that corresponds to the violet end of the 'rainbow'. The last color your eyes can perceiveat that end is the color with the most energy per photon.
A microwave signal at 50 GHz has waves that are 10,000 times as long as a visible signal at yellow (600 nm) has. Therefore the yellow photon carries 10,000 times as much energy as the 50 GHz photon does.
Each photon of blue light has more energy than a photon of any other color, because the blue ones have the highest frequency.
It is not meaningful to talk about "amplitude of the visible light spectrum". One might think that more intense light would mean greater amplitude of the light wave, but it just means more photons. "Visible light" is made up of photons. A single photon has a certain quantifiable energy, and that energy is discussed in terms of frequency or wavelength. A photon with low frequency (towards the red end of the visible light spectrum, for instance) is less energetic than a photon with high frequency (towards the blue end and beyond). For all intents and purposes, the amplitude of a photon wave-packet could be said to be of "unit amplitude", the amplitude of light.
Infrared radiation has less energy (per photon) than visible light.
Visible light has a higher frequency, a higher energy per photon, and a smaller wavelength, compared to infrared.
Energy of photon increases.