Experiments have shown that when a clean tungsten surface is heated by laser irradiation using a focused ruby laser, the rate of evaporation of tungsten from the surface is similar to that obtained by more conventional surface-heating methods. The following experimental data relates the observed temperature change as a function of laser amplitude. Fit a first-order polynomial to these data.
| Laser Pulse amplitude: |
0.7 |
0.9 |
1.1 |
1.2 |
1.5 |
1.7 |
1.9 |
2 |
2.1 |
| Surface temperature (degrees C): |
630 |
740 |
700 |
745 |
1120 |
1205 |
1510 |
1530 |
1520 |