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2 cards from this section. Quick, good the night before a test.
What did Heinrich Hertz observe?
Think about the type of light and the material involved.
Who studied the photoelectric effect after Hertz?
His contributions followed Hertz's foundational work.
What phenomenon was first observed by Heinrich Hertz?
Consider what occurs when light strikes a material.
True or False: The intensity of light affects the energy of emitted electrons.
Remember the key findings of Lenard.
Consider a metal with a work function of 3.1 eV. Calculate the minimum frequency of light required to cause the photoelectric effect. What happens if the frequency is less than this value?
Refer to how work function relates to frequency.
A photon of light hits a metal and ejects an electron with a kinetic energy of 2 eV. If the work function is 2.5 eV, what was the frequency of the light that struck the metal?
Add kinetic energy and work function before applying Planck's constant.
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