With what speed will the fastest photoelectrons be emitted from a surface whose threshold wavelength is 600 nm, when the surface is illuminated with light of wavelength 4 × 10 -7m?
a- 1.1 × 106 m/s
b- 6.0 × 105 m/s
c- 8.6 × 105 m/s
d- 4.2 × 105 m/s
With what speed will the fastest photoelectrons be emitted from a surface whose threshold wavelength is...
with what speed will the fastest photoelectrons be emitted from a surface whose threshold wavelength is 540 nm, when the surface is illuminated with light of wavelength 4*10^-7m
A surface whose work function is 1.8 eV is illuminated by a light whose wavelength is 167 nm. What is the maximum velocity of a photoelectron emitted from the surface? The speed of light is 3 × 108 m/s and Planck’s constant is 6.63 × 10−34 J · s.
Light is incident on the surface of metallic sodium, whose work function is 2.3 eV. The maximum speed of the photoelectrons emitted by the surface is 1.19 ✕ 106 m/s. What is the wavelength of the light? _____________m
1. Find the kinetic energy of a photoelectron emitted from a rubidium (Rb) surface if the wavelength of the incident light is 400 nm (1 nm = 1·10^−9 m), and the binding (or threshold) energy of an electron is 3.6·10^−19J. (A) 5.0·10−19 J (B) 3.6·10−19J (C) 1.4·10−19 J (D) λthreshold > 400 nm, no emission of photoelectrons (E) λthreshold < 400 nm, no emission of photoelectrons Please show how you got the problem
When light of wavelength 317 nm falls on a potassium surface, electrons are emitted that have a maximum kinetic energy of 1.59 eV. What is the work function of potassium? The speed of light is 3 × 10^8 m/s and Planck’s constant is 6.63 × 10^−34 J · s. b. What is the cutoff wavelength of potassium? c. What is the threshold frequency for potassium?
When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV . What is the maximum kinetic energy K0 of the photoelectrons when light of wavelength 340 nm falls on the same surface? Use h = 6.63×10^−34 J⋅s for Planck's constant and c = 3.00×10^8 m/s for the speed of light and express your answer in electron volts. K0= eV
When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is 1.10 eV .What is the maximum kinetic energy K0 of the photoelectrons when light of wavelength 310 nm falls on the same surface? Use h = 6.63×10−34 J⋅s for Planck's constant and c = 3.00×108 m/s for the speed of light and express your answer in electron volts.
Please show steps and show equations used 5. The cut-off (threshold) wavelength for the photoelectric effect for silver is 325 nm. (a) (4 pts) Find the maximum speed of electrons ejected from a silver surface by ultraviolet light of wavelength 250 nm. (b) (2 pts) What would happen if the intensity of light at wavelength 250 nm were increased? (o) 2 pts) If the silver surface were illuminated by a light of wavelength 500 nm, what would happen? Explain (d)...
> Question 17 5 pts The maximum speed of photoelectrons ejected from the surface of a metal is 4.07E5 m/s, when light with a wavelength of 185 nm is shined on the surface. What is the work function of the metal? 0 2.40 eV 05.17 eV O 6.24 eV 0 4.70 eV O 1.42 eV
Light with a wavelength of 137 nm is shined on the surface of potassium metal. Photoelectrons are ejected from the metal's surface. What is the maximum speed of the ejected photoelectrons? The work function of potassium metal is 2.30 eV. 7.15E5 m/s 9.51E6 m/s 6.32E5 m/s 8.99E5 m/s 1.54E6 m/s