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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a black body?
💡 Hint: Think about what absorbs light the best!
Question 2
Easy
What is Planck's constant?
💡 Hint: It connects energy and frequency!
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
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
💡 Hint: What does 'black' indicate in light absorption?
Question 2
The photoelectric effect demonstrates which key concept of quantum theory?
- True
- False
💡 Hint: Does the photoelectric effect support the idea of discrete energy levels?
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
Question 2
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.
Challenge and get performance evaluation