Critical Angle
theta_c = asin(n2/n1)
What it says
Past this angle light is completely reflected instead of leaving the denser medium — how fibre optics work.
Symbols
| Symbol | Quantity | Dimension |
|---|---|---|
theta_c | Critical angle (rad) | 1 |
n1 | Denser index (dimensionless) | 1 |
n2 | Rarer index (dimensionless) | 1 |
Work it out
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Fill in all but one: n1, n2, theta_c are all empty.
Connects to
Filed under Optics · derive through it in the explorer