Thermal Radiation Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What determines the intensity and wavelength distribution of radiation emitted by a body?
- A. Its colour only
- B. Its temperature
- C. Its mass
- D. Its shape only
2. Which surface type is the best absorber and emitter of thermal radiation?
- A. Shiny silver
- B. Matt black
- C. White gloss
- D. Polished metal
3. For a body at a constant temperature, what must be true? (higher tier)
- A. It absorbs more power than it radiates
- B. It radiates more power than it absorbs
- C. Power radiated equals power absorbed
- D. It radiates no power at all
4. A body radiates less power than it absorbs. What happens to its temperature? (higher tier)
- A. It falls
- B. It stays constant
- C. It rises
- D. It becomes zero
5. Two identical metal spheres are heated to different temperatures. Which will emit thermal radiation with the shorter peak wavelength?
- A. The cooler sphere
- B. The hotter sphere
- C. Both emit the same peak wavelength
- D. Neither emits radiation