Question

calculate the energy associated with a photon of wavelength 4500a u

Answer 1

it should be the required answer

Answer 2

4.4×10∧-19

Wavelength of photon=4.5 × 10 ∧ -7 m

h=6.6 × 10 ∧ −34

speed of light is equal to 3 ×10 ∧ 8 .

E=hv

E=c÷  (Wavelength of photon)

By halving the wavelength, the frequency is doubled, and the energy of the incoming photons is also doubled. This effectively doubles the energy delivered to each electron, practically doubling their kinetic energy once they are free of the metal. Einstein proposed that the energy of the photon was connected to the frequency of the wave by the equation E=hf, wherein 'E' is the energy of the photon, 'h' is the 'Planck's constant,' and 'f' is the frequency, based on Max Planck's work on Black Body Radiation.