2.3.2 - Particle Nature of Electromagnetic Radiation: Planck’s Quantum Theory
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Practice Questions
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What is a black body?
💡 Hint: Think about what absorbs light the best!
What is Planck's constant?
💡 Hint: It connects energy and frequency!
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Interactive Quizzes
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What can be described as a perfect black body?
💡 Hint: What does 'black' indicate in light absorption?
The photoelectric effect demonstrates which key concept of quantum theory?
💡 Hint: Does the photoelectric effect support the idea of discrete energy levels?
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Challenge Problems
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A metal has a threshold frequency of 5.5 × 10^14 Hz. If the light incident upon it has a frequency of 1.0 × 10^15 Hz, calculate the maximum kinetic energy of the emitted photoelectrons.
💡 Hint: Remember to calculate using the difference in frequency.
If a bulb emits light with a wavelength of 500 nm, calculate the number of photons emitted per second when the total power output is 60 W.
💡 Hint: Use the formula for energy of a photon in relation to wavelength.
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