| Answer | Crossword Clue |
|---|---|
| ETA | Refractive-index symbol, in physics |
| yag | a synthetic yttrium aluminum garnet of marked hardness and high refractive index that is used especially as a gemstone and in laser technology |
| indexes | number or symbol or expression (as an exponent) associated with another to indicate a mathematical operation to be performed or to indicate use or position in an arrangement 3 is the index of the expression ?5 to indicate the cube root of 5 |
| RHO | Density symbol, in physics |
| OMEGA | Resistance symbol, in physics |
| RHO | Density symbol, in Physics |
| ETA | Efficiency symbol, in physics |
| ETA | Viscosity symbol, in physics |
| PSI | Wave function symbol in physics |
| RHO | Symbol for density in physics equations |
