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A photon in light beam A has twice the energy of one in light beam B. The ratio of  A /  B of the wavelengths is: - PowerPoint PPT Presentation


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0 of 250. 30. A photon in light beam A has twice the energy of one in light beam B. The ratio of  A /  B of the wavelengths is:. 1/2 1/4 1 2 4.

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0 of 250

30

A photon in light beam A has twice the energy of one in light beam B. The ratio of A / B of the wavelengths is:

  • 1/2

  • 1/4

  • 1

  • 2

  • 4


Monoenergetic electrons are incident on a single slit barrier. If the energy of each incident electron is increased the central maximum of the diffraction pattern:

  • widens

  • narrows

  • Stays the same

  • Depends on the speed of the electrons


0 of 250 barrier. If the energy of each incident electron is increased the central maximum of the diffraction pattern:

30

Light beams A and B have the same intensity but A is longer than B. The photon flux (number crossing a unit area per unit time) is:

  • Greater for A than for B

  • Greater than B than for A

  • The same for A and B

  • Not enough info to decide


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