Whenever light travels from denser medium to a rarer medium:

Foundation

Physics Foundation

Reflection from spherical mirror

Refraction and parallel slab

Question

Whenever light travels from denser medium to a rarer medium:

it always reflected back

it bends away from the normal

it bends towards the normal

it passes undeviated

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Whenever light travels from a denser medium to a rarer medium, it bends away from the normal due to refraction.