Explain how Einstein arrived at photoelectric equation by using quantum theory

Einstein's photoelectric equation is

State Planck's quantum theory.

Photoelectric cell is NOT used in

Explain band theory

Derive Einstein's equation of photoelectric effect

State the Einstein's equation for the photoelectric emission

Explain Einstein's theory of photoelectric effect and discuss any two characteristics of photoelectric effect using it

Explain how to measure atmospheric pressure by using open tube manometer.

Explain how to measure atmospheric pressure by using mercury barometer.