If a wave hits a surface at an angle of 55 degrees, will the angle of refraction be the same as the angle of incidence or will it be perpendicular to the angle of incidence?

Answer 1
It all depends whether the wave is moving into an optically more dense or less dense medium. Snell's Law governs the situation and is given by #n_1sintheta_1=n_2sintheta_2#, where #n_i# are the respective refractive indices of the two materials.
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Answer 2

The angle of reflection will be equal to the angle of incidence.

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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.

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.

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.

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.

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