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Davisson-Germer Experiment

In photoelect...

Question

In photoelectric experiment, since electrons are accelerated while moving from cathode to anode, so which type of em wave they will emit?

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Solution

EM wave of visible and ultraviolet lights are emited

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Q. In a photoelectric experiment, a parallel beam of monochromatic light with a power of

200

W is incident on a perfectly absorbing cathode of work function

6.25

eV. The frequency of light is just above the threshold frequency so that the photoelectrons are emitted with negligible kinetic energy. Assume that the photoelectron emission efficiency is

100 %

. A potential difference of

500

V is applied between the cathode and anode. All the emitted electrons are incident normally on the anode and are absorbed. The anode experience a force F =

n \times 10^{- 4}

N due to the impact of the electrons. The value of n is ______.

Mass of the electron

m_{e} = 9 \times 10^{- 31}

1.0 e V = 1.6 \times 10^{- 19}

Q. If four moles of electrons are transferred from anode to cathode in a experiment on electrolysis of water, then total volume of the two gases produced at

S T P

Q. Photons with energy

5 e V

are incident on a cathode

C

in a photoelectric cell. The maximum energy of emitted photo electrons is

2 e V

. When photons of energy

6 e V

are incident. on

C

, no photoelectrons will reach the anode

A

, if the stopping potential of

A

C

Q. In a photoelectric experiment a parallel beam of monochromatic light with power of

200

W is incident on a perfectly absorbing cathode of work function

6.25

eV. The frequency of light is just above the threshold frequency so that the photoelectrons are emitted with negligible kinetic energy. Assume that the photoelectron emission efficiency is

100 % .

A potential difference of

500

V is applied between the cathode and the anode. All the emitted electrons are incident normally on the anode and are absorbed. The anode experiences a force

F = n \times 10^{- 4} N

due to the impact of the electrons. The value of

n

is . Mass of the electron

m_{e} = 9 \times 10^{- 31} kg

1.0 eV = 1.6 \times 10^{- 19} J .

Q. Photons with energy

5 e V

are incident on a cathode

C

in a photoelectric cell. The maximum energy of emitted photo electrons is

2 e V

. When photons of energy

6 e V

are incident on

C

, no photoelectrons will reach the anode

A

. The stopping potential of

A

C

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