The work function for silver is4.26 eV. (a) Convert the value of the work functi
ID: 1743773 • Letter: T
Question
The work function for silver is4.26 eV. (a) Convert the value of the work function fromelectron volts to joules.1 J
(b) Find the cutoff frequency for silver.
2 Hz
(c) What maximum wavelength of light incident on silver releases photoelectrons from thesilver's surface?
3 m
(d) If light of energy 7.1 eV isincident on silver, what is themaximum kinetic energy of the ejected photoelectrons? Give theanswer in electron volts.
4 eV
(e) For photons of energy 7.1 eV, whatstopping potential would be required to arrest the current ofphotoelectrons?
5V (a) Convert the value of the work function fromelectron volts to joules.
1 J
(b) Find the cutoff frequency for silver.
2 Hz
(c) What maximum wavelength of light incident on silver releases photoelectrons from thesilver's surface?
3 m
(d) If light of energy 7.1 eV isincident on silver, what is themaximum kinetic energy of the ejected photoelectrons? Give theanswer in electron volts.
4 eV
(e) For photons of energy 7.1 eV, whatstopping potential would be required to arrest the current ofphotoelectrons?
5V
Explanation / Answer
a. 1 eV = 1.6* 10-19 J Work function ofsilver = 4.26eV = 4.26 * 1.6 *10-19 = 6.82* 10-19 J b. Cutoff frequency isgivenby = h* f0 f0 = 6.82* 10-19 / 6.62 *10-34 = 1.03 *1015 Hz c. Maximum ( cutoff )wavelength 0 = c/ f0 = 3.0 *108 / 1.03 * 1015 0 = 2.913* 10-7 m d. Einstien's photoelectricequation is K = h* f - h *f = energy of incidentphoton k.e. ofphotoelectrons K = 7.1 - 4.26 = 2.84 eV e. energy given by stoppingpotential V0 e* V0 = k.e. ofphotoelectrons e *V0 = 2.84 *e J Stopppingpotential V0 = 2.84 V a. 1 eV = 1.6* 10-19 J Work function ofsilver = 4.26eV = 4.26 * 1.6 *10-19 = 6.82* 10-19 J b. Cutoff frequency isgivenby = h* f0 f0 = 6.82* 10-19 / 6.62 *10-34 = 1.03 *1015 Hz c. Maximum ( cutoff )wavelength 0 = c/ f0 = 3.0 *108 / 1.03 * 1015 0 = 2.913* 10-7 m d. Einstien's photoelectricequation is K = h* f - h *f = energy of incidentphoton k.e. ofphotoelectrons K = 7.1 - 4.26 = 2.84 eV e. energy given by stoppingpotential V0 e* V0 = k.e. ofphotoelectrons e *V0 = 2.84 *e J Stopppingpotential V0 = 2.84 V 0 = 2.913* 10-7 m d. Einstien's photoelectricequation is K = h* f - h *f = energy of incidentphoton k.e. ofphotoelectrons K = 7.1 - 4.26 = 2.84 eV e. energy given by stoppingpotential V0 e* V0 = k.e. ofphotoelectrons e *V0 = 2.84 *e J Stopppingpotential V0 = 2.84 VRelated Questions
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