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Emission and Absorption Spectra

72. A photon ...

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72. A photon of wavelength 4×10 to the power -7m strikes on metal surface, the work function of the metal being 2.13 event. Calculate (i) energy of photon(ev),(ii) kinetic energy of emission,and (iii) velocity of photo electron (1ev=1.6020×10to the power -19 joule.

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A photon of wavelength 4 × 10^–7 m strikes on metal surface, the work function of the metal being 2.13 eV. Calculate (i) the energy of the photon (eV), (ii) the kinetic energy of the emission, and (iii) the velocity of the photoelectron (1 eV= 1.6020 × 10^–19 J).

Q. A photon of wavelength

4 \times 10^{- 7}

m strikes on metal surface, the work function of the metal being

2.13 e V

(i) the energy of the phpton (eV),

(ii) the kinetic energy of the emission,
(iii) the velocity of the photoelectron.

(1 e V = 1.6020 \times 10^{- 19} J) .

Q. A photon of wavelength

4 \times 10^{- 7}

m strikes on a metal surface, the work function of the metal is 2.13 eV.

(i) The energy of the photon (eV)
(ii) The kinetic energy of the emission
(iii) The velocity of the photoelectron.

[1 e V = 1.6020 \times 10^{- 19} J]

.

Q. a) Explain Aufbau principle in detail. Write the increasing order energy of orbitals upto 5d.
b) A photon of wavelength

4 \times 10^{- 7} m

strikes on metal surface, the work function of the metal being 2.13 eV. Calculate
(i) the energy of photon (eV)
(ii) the kinetic energy of the emission, and
(ii) the velocity of the photoelectron.

(1 e V = 1.6020 \times 10^{- 19} J)

Q. A photon of wavelength

4 \times 10^{- 7} m

strike on metal surface,the work function of the metal being

2.13 e V

(1 e V = 1.6020 \times 10^{- 19} J)

calculate the velocity of the photoelectron in

n \times 10^{5} m s^{- 1}

.

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