Question

What will be the energy of one photon of radiation whose frequency is $5 \times 10^{14}\, Hz$?

• A. $199.51\, kJ$
• B. $3.3 \times 10^{-19} \,J$
• C. $6.626 \times 10^{-34} \,J$
• D. $2.31 \times 10^{5} \,J$

Answer 1

Answer: (B)

Energy of one photon is given by the expression, $E=h\upsilon$
$E=6.626\times10^{-34}\,J\,s\times5\times10^{14}\,s^{-1}$
$=3.313\times10^{-19}J$