Question

Which colour light produce maximum photocurrent?​

Answer 1

$\huge\boxed{\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}}$

When green light is made incident on a metal, photoelectrons are emitted by it, this means frequency of green light is the threshold frequency. This is the minimum frequency due to which electron is able to knock out of the surface of metal.

The frequency of light is inversely proportional to the wavelength of light.

Since, the wavelengths of yellow, orange and red light are more than green light, their frequencies are lesser than green light hence, no photoelectrons will emitted when yellow or red light made incident on metal.

Since, the wavelength of blue light is less than green light, its frequency is greater than green light hence, photoelectrons will be emitted.❤

Answer 2

Photocurrents are produced when electron- hole pairs are swept apart by a field, ... a flash lamp light (S = 1 kW/m2) modeled by a black body emitting source (3600 K color temperature).