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प्रश्न
How fast must a 54 g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green light 5400 Å?
उत्तर
Given: de Broglie wavelength of the tennis ball equal to 5400 Å.
m = 54 g
v = ?
λ = `"h"/"mV"`
V = `"h"/"mλ"`
V = `(6.626 xx 10^-34 "JS")/(54 xx 10^-3 "Kg" xx 5400 xx 10^-10 "m")`
V = 2.27 × 10−26 ms−1
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