Question

Does uv rays have more energy than visible rays?

Answer 1

Dear student,

Energy of electromagnetic radiation depends upon frequency and wavelength of electromagnetic radiation.

$$\begin{gathered} \mathrm{Energy}=\mathrm{h\nu },\mathrm{where}\mathrm{\nu }\mathrm{is}\mathrm{frequency}\mathrm{and}\mathrm{h}\mathrm{is}\mathrm{planck}\text{'}\mathrm{s}\mathrm{constant} \\ \mathrm{Energy}=\frac{\mathrm{hc}}{\mathrm{\lambda }} \\ \mathrm{\lambda }\mathrm{is}\mathrm{wavelength}. \\ \mathrm{So}\mathrm{energy}\mathrm{is}\mathrm{directly}\mathrm{proportional}\mathrm{to}\mathrm{frequency}\mathrm{and}\mathrm{inversely}\mathrm{proportional}\mathrm{to}\mathrm{wavelength} \end{gathered}$$

Frequency of UV rays = 7x10¹⁴ - 1.5x10¹⁵ Hz
Frequency of visible rays = 4x10¹⁴ -7x1014 Hz

As frequency of UV rays is more as compared to visible rays so energy of UV rays is more as compared to visible rays.

Regards