2. To use color interference for film-thickness measurements, the tester must can use a lookup table that also incorporates what other information? What other name does this method go by? (1)List the three factors needed to find the exact color from Figure 14.8 and (2) provide the other name for this method. Film thickness, um 0.050 0.075 0.100 0.125 0.150 0.175 0.200 0.225 0.250 0.275 0.300 0.310 0.325 0.345 0.50 0.365 0.375 0.390 0.412 0.426 0.443 0.465 0.476 0.480 0.493 Order I 0.502 0.520 Ten Brown Dark Violet to Red Violet Royal Blue Light Blue to Metallic Blue Color* and Comments Metallic to Very Light Yellow Light Gold or Yellow-Slightly Metallic Gold with Slight Yellow Orange Orange to Melon Red Violet Order II FIGURE 14.8 Silicon dioxide thickness color chart. Blue to Violet Blue Blue Blue to Blue Green Light Green Green to Yellow Green Order III Yellow Green Green Yellow Yellow Light Orange Carnation Pink Violet Red Red Violet Violet Blue Violet Blue Blue Green Green (Broad) *When viewed perpendicularly in daylight fluorescent light