Physics MCQs

Page No. 18

Davison Germer experiment indicates__________________?


a Interference


bPolarization


c Electron diffraction


dRefraction



In Compton scattering, the change in wavelength is maxed if_______________?


aThe angle of scattering is 90°


b The angle of scattering is The angle of scattering is 180°60°


cThe angle of scattering is 180°


dThe angle of scattering is 0



The name of the photon for quantum of light was proposed by________________?


aAmperePlank


bPlank


cThomson


dEinstein


View Answer Einstein

As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?shifts towards longer wavelength


ashifts towards longer wavelength


b shifts towards shorter wavelength


cremain the same


d shifts towards longer as well as shorter wavelengths



Einstein’s photoelectric equation is given by_______________?


a 1/2 mvmax2=hf+Φ


b1/2 mvmax2-hf = Φ


c1/2 mvmax2=hf-Φ


dAll of above are correct


View Answer 1/2 mvmax2=hf-Φ

Rest mass of a photon is________________?


ainfinite


b zero


cvery small


d1.67 x 10-27 kg


View Answer zero

If a material object moves with speed of light its mass becomes ________________?


aequal to its rest mass


bdouble of its rest mass


cinfinite


dzero


View Answer infinite

Select an alternative from of uncertainly principle from the following_______________?


a∆E = h/m∆c(1-cosθ)


b∆E . ∆t = h


cmc2 = hv


dAny of above


View Answer ∆E . ∆t = h

The existence of Ether wind was experimentally rejected by__________________?


aequal to its rest mass


bdouble of its rest mass


cinfinite


dzero


View Answer infinite

Stopping potential for a metal surface in case of photoelectric emission depends on_____________?


athe threshold frequency for the metal surface


b the intensity of incident light


c the frequency of incident light and work function of the metal surface


dall of the above



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