A light source is emitting radiation at 7.63•1014 Hz is incapable of ejecting photoelectrons from a certain metal. However, if the source is given a velocity of 0.28 c towards the metal, photoelectrons just begin to be ejected. A) What is the work function of the metal ? B) Determine the stopping voltage if the source is instead moved at 0.57 c towards the metal ?

A light source is emitting radiation at 7.63•1014 Hz is incapable of ejecting photoelectrons from a certain metal. However, if the source is given a velocity of 0.28 c towards the metal, photoelectrons just begin to be ejected. A) What is the work function of the metal ? B) Determine the stopping voltage if the source is instead moved at 0.57 c towards the metal ?

Similar questions

In a photoelectric experiments, a graph of the light frequency f is plotted against the maximum kinetic energy Kmax of the photoelectron as shown in Figure below fx10“Hz 4.83 K (eV) max Based on the graph, for the light of frequency 7.14 x1014 Hz, calculate a. the threshold wavelength, b. the maximum speed of the photoelectron. (Given c =3.00x10® m s1, h =6.63 x 1034ª J s, me=9.11 x 1031 kg, mp=1.67 x 1027 kg and e=1.60x1019 C)
Two light sources are used in a photoelectric experiment to determine the work function of a particular metal surface. When green light from a mercury lamp (546.1 nm) is used, a stopping potential of 0.376 V reduces the photocurrent to zero. What stopping potential would be observed when using the yellow light from a helium discharge tube (= 587.5 nm)? (Work function is found to be 1.9 eV.)
A given material has a work function of 9.0 eV, answer a) If light is incident with wavelength λ= 1500 x 10-10this material is plated photoelectrons will be created b) If the wavelength of the incident light is lambda λ= 1200 * 10 -10 m what is the energy of the photoelectron more energetic cjected from the board? c) What is the cutting potential that must be applied to the device in order to cancel the emission of these photoelectrons? (alternative 1:) a) Yes, b) KMAX= 3.3 eV; c) V=4140 V (Alternative 2:) a) Yes; b) KMAX=1.36 eV: c) V=-1.36 V (alternative 3:) a) Yes; b) KMAX=3.3 eV c) V=33 V (alternative 4:) a) No b) KMAX =1.36 eV: c)V=-1.36 V (alternative 5:) a) Yes; b) KMAX=6543 eV; c) V =3.3 V
A photoelectron is ejected from a metal via the photoclectric effect. A closer look reveals it is exhibiting wave-like behavior with a wavelength of 0.638 nm. Determine the kinetic energy of the photoelectron. If the photoelectron was ejected from a metal by ultraviolet light with a wavelength of 75 nm, what is the work function of the metal from which it was emitted?
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. When green light from a mercury lamp (λ = 546.1 nm) is used, a stopping potential of 0.874 V reduces the photocurrent to zero. (a) Based on this measurement, what is the work function for this metal? eV (b) What stopping potential would be observed when using light from a red lamp (2 = 652.0 nm)? V
T3
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. When green light from a mercury lamp (? = 546.1 nm) is used, a stopping potential of 0.726 V reduces the photocurrent to zero. (a) Based on this measurement, what is the work function for this metal? eV(b) What stopping potential would be observed when using light from a red lamp (? = 639.0 nm)? V
In a Compton scattering experiment, an x-ray photon scatters through an angle of 15.0° from a free electron that is initially at rest. The electron recoils with a speed of 2,200 km/s. (a) Calculate the wavelength of the incident photon. nm (b) Calculate the angle through which the electron scatters. O
A light with a wavelength of 490 nm reaches a photoelectric surface where the energy maximum photoelectrons is 2.12 eV. A) Determines the surface extraction work.
The work function of a metal is 6.4x10^-19 J.Explain what is meant by the term 'work function.b) Light with a frequency of 1.2x10 Hz is shone onto the metal surface.Find whether or not the photons of this light will cause the photoelectriceffect to take place. (h-6.62x10 J s)c) The light source is now replaced with a light source of frequency1.5x105 Hz.i) Write down Einstein's photoelectric equationi) The photons from the source contain more energy then is required torelease the electrons. How much extra energy is available after theelectron has been released?iii) Photons come from three lamps that emit red, green and blue light.Which of these lamps produces photons with the highest energy?
An investigator is measuring the current in a photoelectric effect experiment. The cathode is illuminated by light of a single wavelength. What happens to the current if the wavelength of the light is reduced by a factor of two while keeping the intensity constant?
Photoelectric effect is observed on two metal surfaces. Light of wavelength 300.0 nm is incident on a metal that has a work function of 2.40 eV. What is the maximum speed of the emitted electrons? m/s