Practice Particle Nature Of Electromagnetic Radiation: Planck’s Quantum Theory (2.3.2)

Practice: Particle Nature of Electromagnetic Radiation: Planck’s Quantum Theory

Lesson 2.3.2Structure of Atom

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10 questions

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6 sample questions

Question 1.
What is a black body?
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Think about what absorbs light the best!
Question 2.
What is Planck's constant?
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It connects energy and frequency!
3Question 3.
What can be described as a perfect black body?
- An object that reflects all light
- An object that absorbs all radiation
- An object that emits no light
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What does 'black' indicate in light absorption?
4Question 4.
The photoelectric effect demonstrates which key concept of quantum theory?
- True
- False
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Does the photoelectric effect support the idea of discrete energy levels?
Question 5.
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.
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Remember to calculate using the difference in frequency.
Question 6.
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.
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Use the formula for energy of a photon in relation to wavelength.

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