Question

Energy of the incident photons on the metal surface is initially \(4 \text{ W}\) and then \(6 \text{ W}\) where \(W\) is the work function of that metal. The ratio of velocities of emitted photoelectrons is

• A. \(\sqrt{3} : \sqrt{5}\)
• B. \(1 : 2\)
• C. \(2 : 3\)
• D. \(\sqrt{2} : \sqrt{3}\)

Hint:

Velocity ratio is the square root of the ratio of the excess energies ($E-W$).

Answer 1

The Correct Option is A