Calculate de-Broglie wavelength of α-particle moving with a speed of 105
cm s-1
(m = 6.6 × 10-27 kg).
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ANSWER
λ=
mv
h
…[de-broglie wave length]
∵E=
2
1
mv
2
⟹mv=
2mE
∴λ=
2mE
h
=
2×6.6×10
−27
×7.7×10
−13
J
6.6×10
−23
=6.56×10
−14
dm
Explanation:
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