11.3.2 - Hallwachs’ and Lenard’s observations
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Practice Questions
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What does the photoelectric effect describe?
💡 Hint: Think about electron behavior with light.
Explain the significance of threshold frequency.
💡 Hint: Remember how different metals behave with light.
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Interactive Quizzes
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Who discovered the photoelectric effect?
💡 Hint: Consider the scientist known for working with metals and light.
True or False: Different metals have the same threshold frequency.
💡 Hint: Think about zinc versus alkali metals.
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Challenge Problems
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You have a piece of metal with a threshold frequency of 5 × 10^14 Hz. Will this metal emit electrons when exposed to light of frequency 6 × 10^14 Hz?
💡 Hint: Compare the frequencies.
Explain why higher frequency light will emit electrons with greater kinetic energy compared to lower frequency light.
💡 Hint: Refer to the relationship between frequency and energy.
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