# How does the reflection coefficient change with scattering and absorption?

My professor of Biomedical Optics course asked us to think upon the evolution of the reflection coefficient with the absorption coefficient $$\mu_a$$, the reduced scattering coefficient $$\mu_s'$$ and the refractive coefficient of medium $$n_2$$.

Here I share what are my thoughts:

• For a highly absorbent medium, hence with high $$\mu_a$$ we will have less reflection since part of the incident light is absorbed in the medium itself

• For a highly scattering medium, hence with $$\mu_s'$$, it will be highly probable that the incident light will be back-scattered. Thus the reflection coefficient will be higher

• Changing the refractive index $$n_2$$ will change the angle of the refracted light but won't have any effect on the reflected light

I'm not very sure about my answers and I feel like thay are not correctly supported by a convincing explanation.

Can you help me provide better answers?