Question

explain about observation of hallwach's and lenard's on photoelectric effect​

Answer 1

Answer:

Hertz And Lenard's Observations Of The Photoelectric Effect. ... Hertz used a spark gap (two sharp electrodes placed at a small distance so that electric sparks can be generated) to detect the presence of electromagnetic waves. To get a closer look, he placed it in a dark box and found that the spark length was reduced.

Answer 2

Answer:

Hertz And Lenard's Observations Of The Photoelectric Effect. ... Hertz used a spark gap (two sharp electrodes placed at a small distance so that electric sparks can be generated) to detect the presence of electromagnetic waves. To get a closer look, he placed it in a dark box and found that the spark length was reduced

Explanation: