I know that a picture to appear, light has to reach the individual sensors of a camera.
But what happens when those photons reach the camera sensor? Do they stay there and accumulate? Or do they pass through everything?
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They are a form of energy. This energy is used to excite an electron and make it get freed from its binding to an atom. This flowing electron is then the electricity that is the electrical signal that makes up the picture.
So, light behaves interestingly like a particle and a wave, depending on the scenario and how you measure it. In this case the photon would be easier to understand like a wave, which transfers energy to the camera sensor, which the sensor reads as a specific wavelength, and then the wave’s energy turns into heat on the sensor.
Have you ever put your hand in front of a very bright light and felt the heat? The same thing is happening inside the camera with less intensity, the camera just measures the wavelength of light as it hits the sensor.
They disexist. Their energy and information go elsewhere. They are destroyed in the process. The same goes for light that hits anything else, too.
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