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In a photoelectric experiment, the wavel...

In a photoelectric experiment, the wavelenght of the light incident on a menatl is changed from 300 nm to 400nm. The decreases in the stopping potential is close to : `((hc)/(e) = 1240 nm -V)`

A

`1.5V`

B

`2.0V`

C

`0.5V`

D

`1.0V`

Text Solution

Verified by Experts

The correct Answer is:
D
`(hc)/(300) =omega_(0)+ e V_(2)`
` (hc)/(400) = omega_(0) +e V_(2)`
`impliesV_(1) -V_(2) = (hc)/(e) ((1)/(300 )-(1)/(400))or Delta V = (1240)/(1200) V implies Delta v square 1V.`
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