Light of wavelength 5000 mathringA falls on a sensitive plate with photoelectric work function of 1.9 eV. The kinetic energy of the photoelectron emitted will be

Question

Light of wavelength 5000 mathringA falls on a sensitive plate with photoelectric work function of 1.9 eV. The kinetic energy of the photoelectron emitted will be (A) 0.58 eV (B) 2.48 eV (C) 1.24 eV (D) 1.16 eV

Tardigrade Admin · Accepted Answer

E=W0+K max ; ' E=(12375/5000)=2.475 eV ∴ K max =E-W0 =2.475-1.9=0.57 eV

Q. Light of wavelength $5000 \overset{˚}{A}$ falls on a sensitive plate with photoelectric work function of $1.9 e V$ . The kinetic energy of the photoelectron emitted will be

0.58 eV

2.48 eV

1.24 eV

1.16 eV

$E = W_{0} + K_{m a x}$ ;
' $E = \frac{12375}{5000} = 2.475 e V$
$∴ K_{m a x} = E - W_{0}$
$= 2.475 - 1.9 = 0.57 e V$

Q. Light of wavelength 5000A˚ falls on a sensitive plate with photoelectric work function of 1.9eV. The kinetic energy of the photoelectron emitted will be