What is Refraction?? What is Refraction??
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The angle of incidence would be 90 degrees, so the angle of refraction is 0 degrees, as the light ray does not deviate.
Absorb.Absorb.Reflecting is when something (e.g. light) bounces off an object; abosrbing is when it is taken into it.
The index of refraction.
Also 1.5. That's how the index of refraction is defined.
Use the definition of "index of refraction". In this case, you simply need to divide the speed of light in a vacuum by the index of refraction.