વેગમાન \( = \frac{{\text{h}}}{\lambda } = \frac{h}{{c/{f}}}\,(c = {f}\,\lambda )\)
\( = \frac{{6.6 \times {{10}^{ - 34}} \times 1.5 \times {{10}^{13}}}}{{3 \times {{10}^8} \times 10}} = \frac{{1 \times 15 \times 6.6 \times {{10}^{ - 30}}}}{3}\,\, = 3.3 \times {10^{ - 29}}\)