Problem in the Defination of electon's wavelength

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The discussion centers on the definition of an electron's wavelength, given by the equation λ = h / (mv). It confirms that the electron possesses mass, specifically its rest mass, which is approximately 9.109382 x 10^-31 kg. The conversation highlights that this mass contributes to the electron's energy. The confusion appears to stem from the interpretation of mass in the context of wave-particle duality. Ultimately, the consensus is that the electron indeed has mass, affirming its role in quantum mechanics.
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Given:
\lambda = h / (mv), whehere lambda is the wavelenght of electron, h Planck's constant, m the rest mass of electron and v the speed of electron.

Problem:
Does electron has a mass? I know it has a rest mass and thus contain energy. This problem is perhaps a defination problem.
 
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Sure the electron has a mass. (What would make you think otherwise?)
 
electron mass = 9.109382 x 10 to the -31st power (in kg)
 
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