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A light radiation is subjected to a meta...

A light radiation is subjected to a metal sheet that total energy subjected is constant and number of photons subjected are varying. Calculate work funcation (in `eV`) of the metal from the graph. Assume `100%` absorption of photons. (Total energy subjected `= 12 eV`)

A

`1 eV`

B

`2 eV`

C

`4 eV`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
According to graph, total energy subjected `= 12 eV`
No. of photons `= 2`
`:.` Energy of each photon `= 6eV`
`(KE)_(max) = E - phi`
`4 = 6 - phi`
or, `phi = 2 eV =` Work funcation
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