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The work function of a substance is 4.0 ...

The work function of a substance is `4.0 eV ` The longest wavelength of light that can cause photoelectron emission from this substance is approximately

A

`220 nm`

B

`310 nm`

C

`540 nm`

D

`400 nm`

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda "in"A^(0)=(12400)/E "in"eV`
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