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Electromagnetic radiation

There was a long debate in history as to what really is light, particles or waves. Now, we understand light much better. Light is a portion in the electromagnetic radiation (EM radiation). What are properties of waves?

Photoelectric effect

Exercise 1

The wavelength of a red light is 700 nm. Estimate its frequency, energy of the photon.,


Frequency = 4.3x1014

E = 2.8e-19 J = 1.8 eV

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