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  1. The angle of a prism is A. One of its refracting surfaces is silvered
  2. A photon of wavelength 300nm interacts with a stationary hydrogen atom in ground
  3. Photons of 5.5 eV energy fall on the surface of the metal emitting photoelectrons
  4. A body undergoes no change in volume. Poisson’s ratio is
  5. The velocity of a particle at an instant is 10 ms⁻¹ and after 5 s the velocity