In a photoelectric effect- the energy of the photon striking a metallic surface is 5-6 -10-19J- The kinetic energy of the ejected electrons is 12-0 - 10-20J- The work function is-

The work function of a metal is $1.6 \times 10^{- 19} J$ . When the metal surface is illuminated by the light of wavelength $6400 \circ A$ , then the maximum kinetic energy of emitted photo-electrons will be (Planck's constant $h = 6.4 \times 10^{- 34} J s$ )

Q. In photoelectric effect, the momentum of incident photon of energy

3 \times 10^{- 19} J

is :

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In a photoelectric effect, the energy of the photon striking a metallic surface is 5.6×10−19J. The kinetic energy of the ejected electrons is 12.0×10−20J. The work function is:

The correct option is C 4.4×10−19JE=W+K.EW=5.6×10−19J−12.0×10−20J =4.4×10−19J

In a photoelectric effect, the energy of the photon striking a metallic surface is $5.6 \times 10^{- 19} J$ . The kinetic energy of the ejected electrons is $12.0 \times 10^{- 20} J$ . The work function is:

The correct option is C $4.4 \times 10^{- 19} J$
$E = W + K . E$
$W = 5.6 \times 10^{- 19} J - 12.0 \times 10^{- 20} J$
$= 4.4 \times 10^{- 19} J$