Like I understand light is photons. But from whence the photons? How come if I’m in a dark room (by the way, why is the room dark? Why no photons in the room?) and I turn on a flashlight, suddenly there’s photons everywhere?
In: Physics
Light is a disturbance in the electric and magnetic fields that make up the universe.
When you throw a rock into a pond you upset the surface level of the pond. Now there are places where the surface is a little higher than normal and corresponding places where it’s lower than normal.
Light is the same thing. When you see something it’s because your eye is detecting changes in the intensity of the electric and magnetic fields on your retina.
The reason something like a fire creates light is because the intense heat causes electrons to jump up into a high energy state. When they come back down they disturb the electric and magnetic fields around them which then travels in all directions.
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