Radiation two photons having energies twice and five times the work function of a metal are incident successively on the metal surface. The ratio of t

Question

Radiation two photons having energies twice and five times the work function of a metal are incident successively on the metal surface. The ratio of t

Radiation two photons having energies twice and five times the work function of a metal are incident successively on the metal surface. The ratio of the maximum velocity of photoelectrons emitted in the two cases will be
A. `1:1`
B. `1:2`
C. `1:3`
D. `1:4`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`E-W_(0)=(1)/(2)mv^(2)`
Case I `2W_(0)-W_(0)=(1)/(2)mv_(1)^(2)` . . (i)
Case II `5W_(0)-W_(0)=(1)/(2)mv_(2)^(2)` . .. (ii)
Therefore, from Eqs. (i) and (ii) we get
`(1W_(0)-W_(0))/(5W_(0)-W_(0))=(v_(1)^(2))/(v_(2)^(2)) or (v_(1))/(v_(2))=(1)/(2)`.

4 views Answered 2023-02-05 15:29