If h is Planck’s constant, the momentum of a photon of wavelength 0.01 Å is:
Answer & explanation
Correct answer: option 4
Momentum of photo, $p=\frac{E}{c}=\frac{hv}{c}$
Where E is the energy of a photon and c is the velocity of light.
$∴p=\frac{hc}{cλ}$ $[∵v=\frac{c}{λ}]$
$=\frac{h}{λ}=\frac{h}{0.01×10^{-10}}=10^{12}h$