Optical Path Length
OPL = n·d
What it says
The distance light would have travelled in vacuum in the same time — what interference actually depends on.
Symbols
| Symbol | Quantity | Dimension |
|---|---|---|
OPL | Optical path length (m) | L |
n | Refractive index (dimensionless) | 1 |
d | Geometric distance (m) | L |
Work it out
Enter what you know. No account needed.
Fill in all but one: n, d, OPL are all empty.
Filed under Optics · derive through it in the explorer