" Threshold energy is equal to "

Photons of frequencies equal to the frequencies of H_(beta) and H_(oo) lines of hydrogen incident on a photosensitive plate, whose threshold frequency is equal to the frequency of H_(alpha) line of hydrogen. The ratio of the maximum kinetic energies of the emitted electrons is

The Threshold energy is given as E_(0) and radiation of energy E falls on metal then K.E is given as

The Threshold energy is given as E_(0) and radiation of energy E falls on metal then K.E is given as

Threshold energy is always ....... than activation energy.

Threshold energy minus energy of reactant is said to be heat of reaction. (Correct the sentence)

Statement: Threshold energy of a reaction is independent of temperature. Explanation: The energy of activation however decreases with increase in temperature.

Assertion :Threshold energy of a reaction is dependent of temperature. Reason :The energy of activation decreases with increase in temperature.