Question

The spectrum of radiation $1.0\times {10}^{14}Hz$ is in the infrared region. The energy of one photon of this in joules will be

• A. $6.62\times {10}^{-48}$
• B. $6.62\times {10}^{-20}$
• C. $\frac{6.62}{3}\times {10}^{-28}$
• D. $3\times 6.62\times {10}^{-28}$

Answer 1

The correct option is B $6.62\times {10}^{-20}$

$E=hv=6.64\times {10}^{-34}\times 1.0\times {10}^{14}=6.62\times {10}^{-20}J$