Module 6—Wave-Particle Duality and Quantum Physics
The Photoelectric Effect Practice Problems
- What is the energy of a photon of blue light that has a frequency of 7.50 × 1014 Hz?
- What is the energy of a photon that has a wavelength of 466 nm?
- What is the energy of a photon that has a frequency of 4.50 × 1014 Hz?
- What is the wavelength of a photon that has 2.1 eV of kinetic energy?
- A photoelectric surface has a work function of 3.30 × 10–19 J. What is the threshold frequency of this surface?
- What is the stopping voltage of an electron that has 5.40 × 10–19 J of kinetic energy?
- A photoelectric surface requires a light of maximum wavelength 675 nm to cause electron emission. What is the work function of this surface?
- A photoelectric surface has a work function of 2.75 eV. What is the minimum frequency of light that will cause photoelectron emission from this surface?
- A photon of wavelength 43 nm is incident upon a metal in a photoelectric apparatus. A stopping voltage of 21 V was obtained. What is the threshold frequency of the metal?
- Light with a frequency of 5.00 × 1014 Hz illuminates a photoelectric surface that has a work function of 2.10 × 10–19 J. What is the maximum kinetic energy of the emitted photoelectrons?
- Light with a wavelength of 530 nm falls on a photoelectric surface that has a work function of 1.70 eV. What is the maximum kinetic energy of any emitted photoelectrons?
- Electrons are ejected from a photoelectric surface with a maximum kinetic energy of 2.9 eV. If the photons of incident light have energy of 3.45 eV, what is the minimum frequency needed to cause photoelectron emission?
- A photon of frequency 7.2 × 1015 Hz is incident upon a metal whose threshold frequency is 8.9 × 1014 Hz. What is the speed of the photoelectron?
- Electrons are ejected from a photoelectric surface with a maximum speed of 4.20 × 105 m/s. If the work function of the metal is 2.55 eV, what is the wavelength of the incident light?
- A photoelectric cell is illuminated with white light (wavelengths from 400 nm to 700 nm). What is the maximum kinetic energy of the electrons emitted by this surface if its work function is 2.30 eV?