The radiant energy is emitted or absorbed continuously in the form of photons.

the radiant energy absorbed by carotenoids is

A y-ray photon is emitted

A light of intensity 16 mW and energy of each photon 10 eV incident on a metal plate of work function 5 eV and area 10^(-4)m^(2) then find the maximum kinetic energy of emitted electrons and the number of photoelectrons emitted per second if photon efficiency is 10% .

An electric heater of surface area 200cm^2 emits radiant energy of 60 kJ at time interval of 1 min. Determine its emissive power. If its emissivity be 0.45, what would be the radiant energy emitted by a black body in one hour, identical to the electrical heater in all respects?

Which form of energy is absorbed in photosynthesis?

The absorption of radiant energy causes

The absorption of radiant energy causes

A photon of wavelength 5000 lambda strikes a metal surface with work function 2.20 eV calculate aTHe energy of the photon in eV b. The kinetic energy of the emitted photo electron c. The velocity of the photoelectron

The radiant energy from the Sun incident normally at the surface of earth is 20kcal//m^(2) min What would have been the radiant energy incident normally on the earth if the sun had a temperature twice of the present one ? .

(i) In the explanations of photoelectric effect, we assume one photon of frequency nu collides with an electron and transfer its energy. This leads to the equation for the maximum energy E_(max) of the emitted electron as E_(max)=hnu-phi_(0) Where phi_(0) is the work function of the metal. if an electron absorbs 2 photons (each of frequency v) what will be the maximum energy for the emitted electron? (ii) Why is this fact (two photon absorption) not taken into consideration in our discussion of the stopping potential?