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4 cards from this section. Quick, good the night before a test.
What is the definition of stopping potential?
Think about what it means to 'stop' the electrons.
Define threshold frequency.
Consider the lowest frequency that can cause electron emission.
What is the effect of increasing the frequency of incident light on stopping potential?
Recall the relation between frequency and energy.
True or False: The stopping potential is affected by the intensity of light.
Consider what factors influence stopping potential.
A metal has a threshold frequency of 5 x 10^14 Hz. If light of 8 x 10^14 Hz is used with intensity 'I', calculate the stopping potential and discuss how increasing the intensity affects photoelectron emission.
Remember formulas for energy and consider the definitions of stopping potential.
If a metal requires a stopping potential of 2.5 V for light of frequency 6 x 10^14 Hz, determine the work function of this metal.
Use Planck's constant and the relation between energy, frequency, and stopping potential.
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