Refractive index is a measure of how much the speed of light is reduced in a medium compared to air/vacuum. A higher refractive index indicates a slower speed of light in the medium and greater bending of light.
Which one of the following statements about the refractive index of a material medium with respect to air is correct ?
Asked in UPSC NDA 1 2018 · Topic: Optics (Reflection and Refraction at plane and spherical surfaces)
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