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Light is a substance with the dual nature of electromagnetic waves and particle flow.
Light has both electromagnetic wave characteristics such as wavelength, frequency, reflection, refraction, and quantum characteristics such as energy, absorption, photoelectric effect, and light pressure.
Light can be understood as electromagnetic radiation composed of vibrating electric fields and vibrating magnetic fields.
The occurrence of light is the result of energy changes in particles such as atoms or molecules. Atoms and molecules are usually in a low-energy ground state.
When they are acted upon by external energy, they can be transformed into excited state particles. Particles in the excited state are highly unstable.
When the particles return from the excited state to the ground state, the excess energy is released in the form of electromagnetic waves and photons, resulting in luminescence.
