Question

The mass of photon with wavelength $220pm$ is:

• A. ${10}^{-31}kg$
• B. ${10}^{-32}kg$
• C. ${10}^{-33}kg$
• D. ${10}^{-34}kg$

Answer 1

The correct option is A ${10}^{-31}kg$

$wavelength=220pm=220\times {10}^{-12}mvelocityoflight=velocityofphoton=3\times {10}^8=\frac{6.626\times {10}^{-34}}{(220\times {10}^{-12})(3\times {10}^8)}={10}^{-31}kg$