In what sense is a laser an “amplifier” of energy? Explain why this concept does not violate conservation of energy.
Answer to relevant QuestionsExplain the difference between spontaneous emission and stimulated emission. The Sun’s energy production (near its center) is initially in the form of X-rays and gamma rays. By the time it reaches the surface, it is mostly in the visible range. Use Compton scattering to explain how this happens. When light of wavelength of 200 nm is incident on a surface, the maximum kinetic energy of the photo-electrons is measured to be 6.0 x 10-19. What is the work function of the surface? When light of wavelength of 250 nm is incident on a metal surface, the maximum speed of the photoelectrons is 4.0 x 105 m/s. What is the work function of the metal in eV? A monochromatic beam of X-rays with a wavelength of 0.280 nm is scattered by a metal foil. If the scattered beam has a wavelength of 0.281 nm, what is the observed scattering angle?
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