Which statement is most accurate? a.) the greater the physical density of a material, the lower the refractive index. b.) the greater the optical density of the material, the lower the refractive index. c.) the greater the physical density of a material, the higher the refractive index. d.) the more optically dense the material, the higher the refractive index. savenvm its d.) i found it in my notes.

Option (D)

Explanation:

The optical density is defined as the property that explains how a light wave propagates while passing through a material.  It also determines the amount of lightwave getting slowed down while passing through a medium.  

The refractive index refers to the ratio between the speed of light in a Vaccum to the speed of light in any medium.

This refractive index is a direct quantification of optical density and they are both proportional to each other.  

For example, the optical density, as well as the refractive index of a diamond, is the highest. On the other hand, the optical density and refractive index of air is the lowest.

Thus, the correct answer is option (D).

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.