According to Rayleigh's law, the amount of scattering of light is inversely proportional to which power of its wavelength?

1. Rayleigh's scattering law states $S' \propto \dfrac{1}{\lambda^4}$. 2. The exponent on the wavelength is 4. 3. So scattering is inversely proportional to the fourth power of wavelength. 4. This is why short-wavelength blue light scatters far more than red. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 2 Optics "Scattering of Light", p.25_