2) A thin film of n=1.3 is on top of a substrate of n=1.5 as shown. The thickness of the film is 0.2um. i. If a certain color of light has frequency 1.0E12 Hz in air, what is the light's frequency in the thin film? A. 6.7E11 Hz B. 8.7E11 Hz C. 1.0E12 Hz D. 1.2E12 Hz E. 1.5E12 Hz ii. Which of the following colors of light (as measured in air) will experience perfectly destructive interference on reflection? A. 308 nm B. 400 nm C. 520 nm D. 615 nm E. 1040 nm n=1 n 1.3 n-1.5

2) A thin film of n=1.3 is on top of a substrate of n=1.5 as shown. The thickness of the film is 0.2um. i. If a certain color of light has frequency 1.0E12 Hz in air, what is the light's frequency in the thin film? A. 6.7E11 Hz B. 8.7E11 Hz C. 1.0E12 Hz D. 1.2E12 Hz E. 1.5E12 Hz ii. Which of the following colors of light (as measured in air) will experience perfectly destructive interference on reflection? A. 308 nm B. 400 nm C. 520 nm D. 615 nm E. 1040 nm n=1 n 1.3 n-1.5