Please calculate stopping voltage, Ek(Joules), and Ek (eV) of 125 nm/ 2.39x10^15 Hz
Please calculate stopping voltage, Ek(Joules), and Ek (eV) of 125 nm/ 2.39x10^15 Hz
How do you calculate the stopping voltage and Ek (Joules) and Ek (eV) from the wavelength and frequency? Please give an example
***Please help fill in the table finding KE...& the
following questions
Metal Wavelength (nm) Frequency (Hz) f Stopping Voltage (V) KE (J) Sodium 125 2.4*1015 -7.58 Sodium 300 1.0*1015 -1.79 Sodium 450 6.7*1014 -0.45 Sodium 538 5.57 1014 -0.01 Sodium 540 5.55*1014 0 a. Describe what happens to the stopping voltage for wavelengths greater than or equal to 540 nm. Based upon your knowledge of the atom, hypothesize an explanation for such behavior. b. At 540nm no electrons are ejected....
2. A sinusoidal voltage has a peak value of 15 V, has a frequency of 125 Hz. Write an expression for the voltage. ets
2. A sinusoidal voltage has a peak value of 15 V, has a frequency of 125 Hz. Write an expression for the voltage. ets
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...
Calculate the energy in joules and eV of a 3.38 Angstrom wavelength
***Please help fill in the table...finding KE and
Frequency for each
Frequency (Hz) Metal Wavelength (nm) Stopping Voltage (V) KE f = i Sodium 247 2.68 Zinc 162 3.30 Copper 152 3.39 Platinum 122 3.79 Calcium 213 2.86
9. The work function for silver is 4.73 eV. Ultraviolet light of wavelength 116 nm is incident on the cl a silver sample. (a) What is the photon energy of the ultraviolet light in units of eV? (b) What is the maximum kinetic energy of the ejected photoelectrons? (c) What stopping voltage would be required to stop the current of photoelectrons? (5 points) (10 points) (5 points)
Calculate the frequency, in Hz, of red light with a wavelength of 705 nm. 4.25x10^14 Hz 2.11x10^11 Hz 2.11x10^2 Hz 4.25x10^5 Hz
Calculate the energy in eV corresponding to the 411 nm of light inside a medium with refractive index 1.3. Round your answer to 2 decimal points
Calculate the kinetic energy, in joules, of the electrons ejected from the surface of cesium by radiation of wavelength (4.20x10^2) nm. Take the threshold frequency of copper to be vo = 4.38x1014 Hz. Express your answer to three significant figures.