A radioactive material undergoes decay by ejecting electrons. The electron ejected in this process is

In electron capture (radioactive process):

In electron capture (radioactive process):

The kinetic energy of the ejected electrons in photoelectric effect is

In photoelectric effect, the number of electrons ejected per second is

A nucleus contains no electrons, yet it ejects them. How?

A metal surface ejects electrons when hit by blue light but not when hit by green light. When the electrons be ejected if the surface is hit by yellow light?