The momentum of a photon with a wavelength of $5000\,\mathring{A}$ is:
- A$1.3 \times 10^{-27}\,kg\cdot m/s$
- B$1.3 \times 10^{-28}\,kg\cdot m/s$
- C$4 \times 10^{29}\,kg\cdot m/s$
- D$4 \times 10^{-18}\,kg\cdot m/s$
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