11.4.3 - Effect of frequency of incident radiation on stopping potential
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Practice Questions
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What is the definition of stopping potential?
💡 Hint: Think about what it means to 'stop' the electrons.
Define threshold frequency.
💡 Hint: Consider the lowest frequency that can cause electron emission.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the effect of increasing the frequency of incident light on stopping potential?
💡 Hint: Recall the relation between frequency and energy.
True or False: The stopping potential is affected by the intensity of light.
💡 Hint: Consider what factors influence stopping potential.
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Challenge Problems
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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.
💡 Hint: 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.
💡 Hint: Use Planck's constant and the relation between energy, frequency, and stopping potential.
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