One milliwatt of light of wavelength 4560 A is incident on a cesium surface. Calculate the photoelectric current liberated assuming a quantum efficiency of 0.5 %. Given Planck's constant `h=6.62xx10^(-34)J-s` and velocity of light `c=3xx10^(8)ms^(-1)`.

The energy of a photon wavelength k = 1 meter is (Planck's constant = 6.625 xx 10^(-34) Js, speed of light = 3 xx 10^(8) m//s )

Calculate the wavelength in nanometers of a quantum of light with frequency of 8times10^(15)s^(-1) .The given value of Planck's constant is 6.63times10^(-34)Js .The velocity of light is 3.0times10^(8)ms^(-1)

Calculate the energy in joule corresponding to light of wavelength 45 nm : (Planck' constant h = 6.63 xx 10^-34 Js , speed of light c = 3 xx 10^8 ms^-1 )

Find the number of photons emitted per second by a 40 W source of monochromatic light of wavelength 6000Å . What is the photoelectric current assuming 5% effeciency of photoelectric effect? Given h=6.62xx10^(-34)Js and c=3xx10^(8) ms^(-1),e=1.6xx10^(-19)C

Light rays of wavelength 6000A^(@) and of photon intensity 39.6 watts//m^(2) is incident on a metal surface. If only one percent of photons incident on the surface of electons emitted per second unit area from the surface will be [Planck constant = 6.64xx10^(-34) J-S ,Velocity of light = 3xx10^(8) ms^(-1) ]

Draw a neat, labelled energy level diagram for H atom showing the transitions. Explain the series of spectral lines for H atom. Whose fixed inner orbit numbers are 3 and 4 respectively. The work function for potassium and caesiumare 2.25 eV and 2.14 eV respectively. Is the photoelectric effect possible for either of them if incident wavelength is 5180 Å ? [Given : Planck's constant =6.63 xx 10^(-34) J.s. , Velocity of light =3xx10^(8)m//s, 1 eV =1.6xx10^(-19)J ]