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Are light rays refracted away from or towards the normal as they pass obliquely from a medium of lower index of refraction into a medium of higher index of refraction?

Answer 1

When light rays move from a rarer media(having low refractive index) to denser media(having high refractive index) after refraction at the interface,light tends to deviate towards the normal,and degrees of deviation depends on the wavelength of the light,higher is the wavelength,lesser is the deviation.

So,red light deviates towards the normal the least and violet light deviates the most of all the visible spectra.

In the diagram, #n_2> n_1#

Remember just the opposite happens in case of light passing from denser to rarer media.

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Answer 2

Leo Abeyta

Light rays are refracted towards the normal as they pass obliquely from a medium of lower index of refraction into a medium of higher index of refraction.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.