Question

What is the observation of hallwachs in photoelectric effect​

Answer 1

Explanation:

Wilhelm Hallwachs and Philipp Lenard investigated the phenomenon of photoelectric emission in detail during 1886-1902. ... Hallwachs and Lenard also observed that when the light fell on the emitter plate, no electrons were emitted at all when the frequency of the incident light was smaller than a certain minimum value.

MARK ME AS BRAINLIESIST