PHYS 158 Lecture Notes - Small-Angle Approximation, Keratin, Iridescence

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You will receive no credit for items you complete after the assignment is due. Description: basic conceptual and quantitative questions on thin lm interference, followed by an application to the iridescence of butter y wings. To understand the concept of thin- lm interference and how to apply it. It causes the bright colors in soap bubbles and oil slicks. It also leads to the iridescent colors on many insects and bird feathers. In this problem, you will learn how to work with thin- Lm interference and see how it creates the dazzling display of a tropical butter y"s wings. When light is incident on a thin lm, some of the light will be re ected at the front surface of the lm, and the rest will be transmitted into the lm. Some of the transmitted light will be re ected from the back surface of the lm.

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