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Physics Postmortem Series (Special Edition 2021 Intermediate Part-1 x7. What advantages an electron microscope has over an optical microscope? xil. Since mass is a form of energy. can we conclude that a compressed spring has more mass than the same spring when it is not compressed? xill. A beam of red light and a beam of blue light have exactly the same energy. Which beam contains the greater number of photons? xiv which photon, red, green or blue carries the most (a) energy and (b) momentum? Awhich has the lower energy quania? Radio-waves or X-rays? XVI. Does the brightness of a beam of light primarily depends on the frequency of photons ar on the number of photons? xvii. When ultraviolet light falls on certain dyes, visible light is emitted, why does this happen when infrared light falls on these dyes? xwrit of an electron and proton have the same d Broglie wavelength, which particle speed? Xit. If the following particles have the same energy, which has the shortest wavelength? Electron alpha particle, neutron, profon xxAwhat is the de Broglie wavelength of an electron whose kinetic energy is 120 eV? xxl. State principle of complementarity. exile An electron is accelerated through a potential difference of so V. Calculate its de Broglie wavelength xxii. Give an experimental proof of de-Broglie wavelength. ...
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