Activity: EM radiation and the atom

IB Physics: Activity: EM radiation and the atom

When electric current is passed through the filament of a light bulb the light bulb gets hot and emits light.You may not have noticed this but when you heat a piece of metal it first glows red then as the temperature gets hotter its colour changes. The colour seems to be related to energy. Red is lowest energy blue is highest.So it seems that when atoms are given energy they give out light but what changes take place...

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