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Photoelectric Effect

Metal Foil

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  • As blue light strikes the metal foil, the foil emits electrons.

Metal Foil

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  • That didn’t work
  • Maybe its still not bright (intense) enough.

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  • Still not working.
  • What happens with brighter (more intense) blue light?

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  • More blue light means more electrons emitted, but that doesn’t work with red.

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  • High FREQUENCY light even from a dim source can eject electrons from a photosensitive metal

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  • Low Frequency light, even very bright (very intense) cannot dislodge electrons