i. The emitter in a photoelectric tube has a threshold wavelength of 6000 Å.Determine the wavelength of the light incident on the tube if the stoppingpotential for this light is 2.5 V.ii. Find the work function (in eV) for potassium if the largest wavelength forelectron emission in a photoelectric experiment is 5620 Å.iii. Potassium is illuminated with ultraviolet light of wavelength 2500 Å. Using thework function determined in (ii), what is the maximum kinetic energy (in J) ofemitted electron?iv. Discuss why kinetic energy of incident photons does not causes increment in thephotoelectron emission?

Dear student, Since all questions are different as per guidelines we can author only first one…

Answered: i. The emitter in a photoelectric tube…

i. The emitter in a photoelectric tube has a threshold wavelength of 6000 Å. Determine the wavelength of the light incident on the tube if the stopping potential for this light is 2.5 V.

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter39: Introduction To Quantum Physics

Section: Chapter Questions

Problem 13P

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Concept explainers

Compton effect

The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.

Recoil Velocity

The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.

Question

i. The emitter in a photoelectric tube has a threshold wavelength of 6000 Å.
Determine the wavelength of the light incident on the tube if the stopping
potential for this light is 2.5 V.
ii. Find the work function (in eV) for potassium if the largest wavelength for
electron emission in a photoelectric experiment is 5620 Å.
iii. Potassium is illuminated with ultraviolet light of wavelength 2500 Å. Using the
work function determined in (ii), what is the maximum kinetic energy (in J) of
emitted electron?
iv. Discuss why kinetic energy of incident photons does not causes increment in the
photoelectron emission?

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