1.An aluminum cathode has a work function Φ=4.1eV. A stopping voltage Vs=1.7 V is applied between the anode and cathode. What is the maximum wavelength of the photon necessary to observe a current across the photoelectric tube? (8pts) [Answer in nm]
2.In an ion beam experiment, He+ ions are accelerated between two electrodes in a vacuum tube to generate a beam of high-energy ions. The ions reach kinetic energy Ek = 4·10-19 Joules and their mass is m=6.65·10-27 kg. What is the momentum p of these accelerated ions? (5 pts) [Answer in kg·m·s-1 ]
3.In a similar experiment Ar+ ions are accelerated to generate an argon ion beam. The mass of the Ar+ ions is m=6.63 × 10-26 kg and they reach kinetic energy Ek=5 × 10-19 Joules. These particles are light and have high velocity therefore they can be subjected to quantum effects. What is the wavelength of these Ar+ ion. (8 pts) [Answer in m]
4.A photon of wavelength 238 nm extracts an electron from an iron electrode (Φ=4.31eV), what is the wavelength of this electron? Remember electrons are also particles subjected to quantum effects. (8pts) [Answer in nm]
1.An aluminum cathode has a work function Φ=4.1eV. A stopping voltage Vs=1.7 V is applied between...
Work shown please. Answers to the following questions: 1) 3.864 x 10^-19 J 2.412 eV 5.831 x 10^14 Hz 2) 154 pm 3) 1.94 x 10^-18 J or 12.1 eV 4) 32 electrons Chapter 29 & 30 Homework Problem Set Use extra paper if needed 1. What is the energy (in joules and eV) and frequency carried by a photon with a wavelength of 514.5 nm? answer 2. What is the wavelength of a photon that produces a photoelectron with...
1. Calculate the Work Function of a metal that has a threshold frequency of 9.54 x 1014 s-1. answer: 63.3*10^(-20)J 2. What is the wavelength of this light in nm? answer: 314nm 3. What would be the Kinetic Energy of an ejected photoelectron if 3.26 x 1015 s-1 light struck (hit) that same metal? answer: 1.53*10^(-18)J 4. What would be the velocity and De Broglie Wavelength of ejected photoelectron? answer: 1.83*10^(6)m/s 5.What is the wavelength of light (in nm) of...