Ultraviolet light is incident normally on the surface of a certain substance. The binding energy of the electrons in this substance is 3.44 eV. The incident light has an intensity of 0.055 W/m2. The electrons are photoelectrically emitted with a maximum speed of 4.2 X 105 m/s. How many electrons are emitted from a square centimeter of the surface each second? Assume that the absorption of every photon ejects an electron.

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Solution shows how to calculate the number of electrons from the given data with good explanation.

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2. In the photoelectriceffect experiment, light photons strike a photoelectric material in a phototube and electrons are emitted with a certain kinetic energy. If the stopping energy of the electrons is graphed as a function of the frequency of light, then the slope of the line will be Planck's constant

1. Energy is ____ when an n = 4 to n = 2 transition occurs when an electron adds to the H+ ion and ends up in the n = 3 shell.
a) destroyed, created
b) emitted, created
c) absorbed, emitted
d) emitted, absorbed
e) emitted, emitted
2. Calculate delta(E) if 1 = 1.40 kJ and w = -658 J.
a) -657 kJ
b) 0.742 kJ
c) 1.4

The work function of an element is the energy required to remove an electron from the surface of the solid. The work function for cadmium is 378.2 kJ/mol (that is, it takes 378.2 kJ of energy to remove 1 mol of electrons from 1 mol of Cd atoms on the surface of a sample of cadmium.) What is the maximum wavelength of light that c

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The work function W of a metal specifies the minimum energy required to remove an electron from that metal, and is expressed as an energy per mole of electrons. For Calcium Ca, W=262 kJ mol^-1.
(a) A sample of Ca is irradiated with green light. Are electrons ejected? Justify.
(b) A sample of C

A student performs a photoelectric experiment in which light of various frequencies is incident on a photosensitive metal plate. This plate, a second metal plate, and a power supply are connected in a circuit, which also contains two meters, M1 and M2, as shown above (see attachment, #1).
The student shines light of a specific

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Find the constant C in units of eV-nm.
3. a) ln the photoelectriceffect, light of a given wavelength is incident on a metal surface in a vacuum and, if the wavelength is short enough.c a uses electrons to be emitted. If W is the work function of the metal

1.The wavelength of a photon is 7 x10^-7 m. Calculate the frequency of the photon. Also calculate the energy of the photon in Joules and eV
a)4.285 x 10^15 Hertz, 2.84 x 10^-19 Joules, 2.36 eV
b)4.285 x 10^15 Hertz, 2.84 x 10^-19 Joules, 1.77 eV
c)3.236 x 10^15 Hertz, 3.42 x 10^-19 Joules, 2.36 eV
d)3.236 x 10^15 Hertz, 3.4

Light from a laser hits the surface of cesium. With a minimum photon energy of 2.14eV being required to remove photons. When the surface of cesium is illuminated with this light photoelectrons are emitted with a max kinetic energy of 0.76eV. Assuming that the Planck constant is 4.14x10^-15 eV Hz-1.
What would be the energy of