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That is a page from my textbook. The book mentions that the angle of incidence on the right side when added with the angle of the refraction equals 60 degrees. Why is that?

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- Thread starter Alameen Damer
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That is a page from my textbook. The book mentions that the angle of incidence on the right side when added with the angle of the refraction equals 60 degrees. Why is that?

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mfb

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Which triangle? If you mean the one formed by the refracted ray, it is not a right angle triangle.

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blue_leaf77

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sophiecentaur

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mfb

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That is the triangle I meant.

And the sum of those three angles is 180 degrees.

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