Question

what is the wavelength of the electron if it has kinetic energy 4.55×10^-18J​

Answer 1

Answer:

ANSWER

KE=21mv2=4.55×10−25

or 21×9.1×10−31×v2=4.55×10−25

or v2=9.1×10−312×4.55×10−25

    v=103ms−1

Applying de Broglie equation,

λ=mvh=9.1×10−31×1036.6×10−34=0.72×10−6m.

Explanation:

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