Question 132: Dual Nature of Matter and Radiation

Question

Two streams of photons, possessing energies equal to five and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of the photoelectron emitted, in the two cases respectively, will be

Accepted Answer

$${1 \over 2}mv_1^2 = 5\phi  - \phi $$
And, $${1 \over 2}mv_2^2 = 10\phi  - \phi $$
$$ \Rightarrow {\left( {{{{v_1}} \over {{v_2}}}} \right)^2} = {4 \over 9}$$
$$ \Rightarrow {{{v_1}} \over {{v_2}}} = {2 \over 3}$$

Answer

1 : 2

Answer

1 : 3

Answer

2 : 3

Answer

3 : 2

Dual Nature of Matter and Radiation

Two streams of photons, possessing energies equal to five and ten times the work function of metal are incident on the metal surface successively. The ratio of maximum velocities of the photoelectron emitted, in the two cases respectively, will be

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