CBSE Questions for Class 12 Medical Physics Dual Nature Of Radiation And Matter Quiz 16 - MCQExams.com

An electron (of mass m) and a photon have the same energy E in the range of a few eV. The ratio of the de-Broglie wavelength associated with the electron and the wavelength of the photon is (c = speed of light in vacuum)
  • $$\dfrac{1}{c} \left(\dfrac{E}{2m} \right)^{1/2}$$
  • $$c (2mE)^{1/2}$$
  • $$\left(\dfrac{E}{2m} \right)^{1/2}$$
  • $$\dfrac{1}{c} \left(\dfrac{2E}{m} \right)^{1/2}$$
A particle moving with kinetic energy E has de Broglie wavelength $$\lambda$$. If energy $$\Delta E$$ is added to its energy, the wavelength become $$\lambda /2$$. Value of $$\Delta E$$, is?
  • $$2E$$
  • $$4E$$
  • $$3E$$
  • $$E$$
0:0:1


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