The photoelectric effect 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 is the work function of a metal?
- A. The kinetic energy of an emitted electron
- B. The energy of the incoming photon
- C. The minimum energy needed to remove an electron from the surface
- D. The total energy of the metal's electrons
2. Light below the threshold frequency falls on a metal at very high intensity. What happens?
- A. Electrons are emitted with high speed
- B. No photoelectrons are emitted
- C. Electrons are emitted after a delay
- D. Electrons are emitted at a low rate
3. A photon of energy 5.0 × 10⁻¹⁹ J hits a metal with work function 3.0 × 10⁻¹⁹ J. What is the maximum kinetic energy?
- A. 8.0 × 10⁻¹⁹ J
- B. 1.5 × 10⁻¹⁹ J
- C. 2.0 × 10⁻¹⁹ J
- D. 5.0 × 10⁻¹⁹ J
4. How many joules is 2.0 eV?
- A. 3.2 × 10⁻¹⁹ J
- B. 1.25 × 10¹⁹ J
- C. 0.80 × 10⁻¹⁹ J
- D. 2.0 J
5. Which observation can the wave model not explain?
- A. Photoemission shows a threshold frequency
- B. Radiation can be diffracted
- C. Light has a speed of 3.00 × 10⁸ m s⁻¹
- D. Light can be polarised