Question

Excited hydrogen atom emits light in the ultraviolet region at $2.47\times {10}^{15}Hz$. With this frequency, the energy of a single photon is: $(h=6.63\times {10}^{-34}Js)$

• A. $8.041\times {10}^{-40}J$
• B. $2.680\times {10}^{-19}J$
• C. $1.640\times {10}^{-18}J$
• D. $6.111\times {10}^{-17}J$

Answer 1

The correct option is C $1.640\times {10}^{-18}J$

Energy of photon$=h\times \nu$

Energy $=6.63\times {10}^{-34}\times 2.47\times {10}^{15}$

$=1.640\times {10}^{-18}J$