Calculate the frequency if wavelength is $750 \mathrm{~nm}$.

Calculate the frequency if wavelength is $750 \mathrm{~nm}$.
  1. $2 \times 10^{14} \mathrm{~Hz}$
  2. $4 \times 10^{14} \mathrm{~Hz}$
  3. $6 \times 10^{15} \mathrm{~Hz}$
  4. $8 \times 10^{15} \mathrm{~Hz}$

Solution

$\lambda=\frac{\mathrm{c}}{\mathrm{v}}=\frac{3 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}}{750 \times 10^{-9} \mathrm{~m}}=4 \times 10^{14} \mathrm{~Hz}$

Asked in: MHT CET 2023 (14 May Shift 2)

Practice more Structure of Atom questions on Aicharya