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If the wavelength of an electron is equal to 7.04 × 10^?7 m, how fast is...

If the wavelength of an electron is equal to 7.04 × 10^?7 m, how fast is it moving? Planck’s constant is 6.63 × 10^?34 J · s. Answer in units of km/s.

If the electron has a speed of 1.58 × 107 m/s, what is its wavelength? Answer in units of m.

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Answer #1

The wavelength (?) associated with a particle is related to its momentum (p) through the Planck constant, h, as: ?=h/p (known as de Broglie relation)

or ?=h/(m*v)

where, m= mass and v= velocity of the particle

I am exetremly sorry that I have attempt one extra calculation in second part.

Please like... Thanks!

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