Find a relation between cut-off potential, frequency of the incident light and threshold frequency.

Photoelectric work function for a surface is 2.4 eV. Light of wavelength 6.8 xx 10^(-7) m shines on the surface. Find the frequency of incident light and also the threshold frequency. Will there be photoelectric emission or not ?

In photo electric effect, the slope of the straight line graph between stopping potential and frequency of the incident light gives the ratio of Planck's constant to

One metal sphere of radius r of material with threshold frequency v_0 is kept isolated and light of frequency v is incident on it. Frequency of the incident light is more than the threshold frequency of material. Find the maximum number of electrons which can be emitted from the sphere.

Draw a graph between stopping potential and the frequency of two metals A and B having threshold frequencies v_0 and 2v_0 .

Assertion : The threshold frequency of photoelectric effect supports the particle nature of light. Reason : If frequency of incident light is less than the threshold frequency, electrons are not emitted from metal surface.

Assertion : The threshold frequency of photoelectric effect supports the particle nature of sunlight . Reason : If frequency of incident light is less than the threshold frequency , electrons are not emitted from metal surface.

Graph between stopping potential and frequency of light as shown find the work function

Explain the term stopping potential and threshold frequency.

The de Broglie wavelenght (lambda) associated with a photoelectron varies with the frequency (v) of the incident radiation as,[ v_(0) is threshold frequency]:

What is photoelectric effect? Explain experimentally the variation of photoelectric current with (i) the intensity of the incident light (ii) the potential difference between the plates and (iii) the frequency of the incident light and hence state the laws of photoelectric emission.