Question

The momentum of a photon is $3.3\times {10}^{-29}kgm/s$. Its frequency will be

• A. $3\times {10}^{3}Hz$
• B. $6\times {10}^{3}Hz$
• C. $7.5\times {10}^{12}Hz$
• D. $1.5\times {10}^{13}kg/s$

Answer 1

The correct option is D $1.5\times {10}^{13}kg/s$

We know that,

$P=\frac{hv}{C}$

Now substituting the values

$P=\frac{6.6\times {10}^{-34}\times 1.5\times {10}^{13}}{3\times {10}^8}$

$P=3.3\times {10}^{-29}kg\_m/sec$

Thus, momentum $=3.3\times {10}^{-29}kg/s$