Question

An electron tube that uses metals that give off electrons when struck by light is called?

Answer 1

Answer:

gold foil i think soo.......

Answer 2

Answer:

The filament (cathode) has a dual function: it emits electrons when heated; and, together with the plate, it creates an electric field due to the potential difference between them. Such a tube with only two electrodes is termed a diode, and is used for rectification...