Question

What is the momentum of a photon having frequency $1.5\times 10^{13} \, Hz$ ?

• A. $3.3\times 10^{- 29} \, kgms^{- 1}$
• B. $3.3\times 10^{- 34} \, kgms^{- 1}$
• C. $6.6\times 10^{- 34} \, kgms^{- 1}$
• D. $6.6\times 10^{- 30} \, kgms^{- 1}$

Answer 1

Answer: (A)

$p=\frac{h \nu}{c}=\frac{6.63 \times 10^{- 34} \times 1.5 \times 10^{13}}{3 \times 10^{8}}=3.3\times 10^{- 29}\text{kg m s}^{- 1}$