A cylindrical source of light which emits radiation radially (from a curved surface) only, placed at the center of a hollow, metallic cylindrical surface, as shown in the diagram.
The power of the source is
90 watt and it emits light of wavelength
4000 A only. The emitted photons strike the metallic cylindrical surface which results in the ejection of photoelectrons. All ejected photoelectrons reach the anode (light source). The magnitude of photocurrent in amp is
[Given:h=6.4×10−34J/sec].
![131929_9bb16d775dd94ba4bc4ff4b395d2e86f.png](https://search-static.byjusweb.com/question-images/toppr_ext/questions/131929_9bb16d775dd94ba4bc4ff4b395d2e86f.png)