D)when thin film thickness increases frings extend outwardly δ=2eVn2-n2si2i+=kk=1.2.3.…max) when thin film thickness e increases frings extend outwardly
1)when thin film thickness increases： frings extend outwardly 2 2 sin 2 2 1 2 2 = e n − n i + = k k =1.2.3. (max) i i' i i' when thin film thickness frings extend outwardly e increases i ， :
2)when thin film thickness decreased frings contract] inwardly e 6=2en2-n2sin2i+=kk=1.2.3.…明纹 frings extend outwardly e decreases frings contract inward
2)when thin film thickness decreases： i i' i i' 2 2 sin 2 2 1 2 2 = e n − n i + = k k =1.2.3. 明纹 frings extend outwardly frings contract inwardly e decreases i ， frings contract inwardly e