10. Choose the incorrect statement(a) The number of photoelectrons emitted is proportional to light intensity(b) The velocity of photoelectrons is proportional to the frequency of light(c) Photoelectric effect is an instantaneous process.(d) Stopping potential is independent of incident frequency.11. Choose the incorrect statement. In the Compton scattering-(a) The increase in wavelength ∆𝜆, is independent of the incident wavelength.(b) Compton wavelength is always a constant quantity.(c) The wavelength increase, ∆𝜆, depends on the scattering angle of the photon(d) The wavelength increase is independent of the scattering angle of a photon.12. The phase speed of matter waves for a relativistic free moving particle in a vacuum is;(a) Equal to the speed of light in a vacuum(b) Less than the speed of light in a vacuum(c) More than the speed of light in a vacuum(d) Equal to half the speed of light in a vacuum

In the following diagram, photons of frequency 3Φ/h are incident on a metal, and interact with electrons at energy levels A and B.Which of the following statements is true?Select one:a.photoelectrons from energy level B will have more kinetic energy than those from energy level Ab.photoelectrons from energy level A will have more kinetic energy than those from energy level Bc.photoelectrons from A will require a smaller stopping voltage than those from level Bd.kinetic energy of photoelectrons depend only on photon frequency and are independent of inital electron energye.kinetic energy of photoelectrons depend only on work function and are independent of inital electron energyf.no photoelectrons will be emitted

Select the incorrect statement regarding photoelectric effectThe number of ejected electrons do not depends upon the frequency of light.The kinetic energy of ejected electrons depends upon the frequency of the light usedThe number of the ejected electrons is proportional to the intensity of the light usedThere is a time lag between the striking of light and ejection of electrons

n a medium of refractive index 𝑛, the wavelength of light 𝜆0 is related to its frequency 𝑓0 via the relation𝜆0 = 𝑐/(𝑛𝑓0) , where 𝑐 is the speed of light in vacuum. Fig. 1 is labelled with variables of relevance,including input photon frequency 𝑓, outgoing photon angle 𝜃, outgoing photon frequency 𝑓′, outgoingelectron angle 𝜙, outgoing electron energy 𝐸 and outgoing electron momentum 𝒑. In this problem, themomenta of all particles, before and after, lie entirely in the plane of the paper.1. Write the energy conservation equation and the momentum conservation equations for Comptonscattering for incident and outgoing photons in a medium of refractive index 𝑛. Explain youranswer in detail

Given below are two statements :Statement I : Stopping potential in photoelectric effect does not depend on the power of the light source.Statement II : For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light.In the light of above statements, choose the most appropriate answer from the options given below.Statement I is incorrect but statement II is correctBoth Statement I and Statement II are incorrectStatement I is correct but statement II is incorrectBoth statement I and statement II are correct

For the photoelectric effect, the maximum kinetic energy (Ek) of the photoelectrons is plotted against the frequency (v) of the incident photons as shown in figure. The slope of the graph gives