Question

For a photocell, work function is 'W₀' and stopping potential is 'v'. The wavelength of the incident radiation is (h =Planck's constant, C = velocity of light, e = charge of electron) ____________.

पर्याय

• `("hc")/("W"_0 - "eV")`

• `("h"^2"c"^2)/("W"_0 + "eV")`

• `("h"^2"c"^2)/("W"_0 + "e"^2"V")`

• `("hc")/("W"_0 + "eV")`

Answer 1

For a photocell, work function is 'W₀' and stopping potential is 'v'. The wavelength of the incident radiation is `("hc")/("W"_0 + "eV")`.

Explanation:

We have the relation:

`"eV" = "hC"/lambda - "W"_0`

`therefore "hc"/lambda = "W"_0 + "eV"`

`therefore lambda = "hc"/("W"_0 + "eV")`