Question

Calculate the energy of light having a wavelength of 395 nm.
show work

Answers

  1. Answer: 5.032\times 10^{-19}\ J

    Explanation:

    Given

    The wavelength of the light is \lambda =395\ nm

    Energy associated with a photon(light) is given by E=\frac{hc}{\lambda}

    where, h=\text{Planck constant}

    c=\text{speed of light}

    \Rightarrow E=\dfrac{6.626\times 10^{-34}\times 3\times 10^8}{395\times 10^{-9}}\\\\\Rightarrow E=5.032\times 10^{-19}\ J

    Therefore, the energy associated with the light is 5.032\times 10^{-19}\ J

Leave a Comment