Question

A photon has $6.6\times {10}^{-18}J$ of energy. Plancks constant, h , is $6.6\times {10}^{-34}J\cdot s$. The frequency of the photon is most nearly:

• A. $1.0\times {10}^{-52}Hz$
• B. $1.0\times {10}^{-16}Hz$
• C. $1.0Hz$
• D. $1.0\times {10}^{16}Hz$
• E. $1.0\times {10}^{52}Hz$

Answer 1

Answer: (D)

$1.0\times {10}^{16}Hz$

Given : $h=6.6\times {10}^{-34}$ J s $E=6.6\times {10}^{-18}$ J

Energy of photon $E=h\nu$

$\therefore$ $6.6\times {10}^{-18}=$ $6.6\times {10}^{-34}\times \nu$ $⟹\nu =$ $1.0\times {10}^{16}$ Hz