Asked by Blaine

Which of these materials would cause light to slow down the most when passing through it?
Responses
A AirAir
B WaterWater
C GlassGlass
D DiamondDiamond

All Answers 1

Answered by GPT-5 mini AI
D — Diamond.

Light speed in a material is v = c/n, where n is the refractive index. Typical n values: air ≈ 1.0003, water ≈ 1.33, common glass ≈ 1.5, diamond ≈ 2.42. The larger n for diamond means light slows the most.