The wavelength of an X-ray beam is 10Å. The mass of a fictitious particle having the same energy as that of the X-ray photons is x/3 h kg. The value of x is_________. (h = Planck’s constant)

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The wavelength of an X-ray beam is 10Å. The mass of a fictitious particle having the same energy as that of the X-ray photons is x/3 h kg. The value of x is_________. (h = Planck’s constant)
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Sep
The wavelength of an X-ray beam is 10Å. The mass of a fictitious particle having the same energy as that of the X-ray photons is x/3 h kg. The value of x is_________. (h = Planck’s constant) The wavelength of an X-ray beam is 10Å. The mass of a fictitious particle having the same energy [...]
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