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Critical angle
Waves, sound, and light
Critical angle
sin θ
c
= n
2
/n
1
θ
c
critical angle, n
1
starting medium (higher n), n
2
second medium
Watch for
Total internal reflection only from higher to lower n.
Apply it · 1 question
Critical angle from glass to air
Light and sound · set 3 · hard
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Index of refraction and Snell's law
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Thin lens and mirror equation