physics question 13 hw20

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What is the de Brogile wavelength of an electron that strikes the back of the face of a TV screen at 0.1 the speed of light? The speed of light is 2.998 × 108 m/s. Answer in units of m.

Jul 15th, 2015

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Given,

velocity = 0.1 the speed of light = 2.998 x 10^7 m/s

mass of electron = 9.109 x 10^-31 Kg

We know,

De Brogile wavelength = h/mv

where, h = Planck's constant = 6.63 x 10^-34 J.s

so, wavelength = (6.63x10^-34) / (9.109 x10^-31 x 2.998 x 10^7)

De brogile wavelength =  2.45 x 10^-11 m

Please let me know if you need any clarification. I'm always happy to answer your questions. Kindly best this answer if it has helped you.Please let me know if you need any clarification. I'm always happy to answer your questions. Kindly best this answer if it has helped you.
Jul 15th, 2015

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