For photoelectric effect in sodium, fig. shows the plot of cut-off voltage versus frequency of the incident radiation. Caclculate:

(i) the threshold frequency
(ii) the work function for sodium. (Use `h=6.6xx10^(-34)Js`)

Calculate the threshold frequency of a photon from a photosensitive surface of work function 0.2 eV . Take h=6.6xx10^(-34)Js.

A graph regarding photoelectric effect is shown between the maximum kinetic energy of electrons and the frequency of the incident light. On the basis of data as shown in the graph, calculate (a) threshold frequency , (b) work- function, (c ) planck constant

In an experiment on the photoelectric effect , the slope of the cut - off voltage versus frequency of incident light is found to be 4.12xx10^(-15) V s . The value of Planck's constant is

Calculate the frequency of a photon, having energy 41.25 eV. (h=6.6xx10^(-34) Js) .

When a high frequency electromagnetic radiation is incident on a metallic surface, electrons are emitted from the surface. Energy of emitted photoelectrons depends only on the frequency of incident electromagnetic radiation and the number of emitted electrons depends only on the intensity of incident light. Einstein's protoelectron equation [K_(max)=hv-phi] correctly ecplains the PE, where upsilon= frequency of incident light and phi= work function. Q. For photoelectric effect in a metal, the graph of the stopping potential V_0 (in volt) versus frequency upsilon (in hertz) of the incident radiation is shown in Fig. The work function of the metal (in eV) is.

The photoelectron of work function 3.1 eV is emitted with velocity 2.5 xx 10^(6) m/s . The frequency of incident radiation is

The work function of material (in eV), whose threshold frequency is 6×10^(14) Hz would be