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Unformatted text preview: homework 13 LIN, KEVIN Due: Apr 20 2008, 4:00 am 1 Question 1, chap 35, sect 1. part 1 of 2 10 points A thin film of cryolite ( n c = 1 . 38 ) is ap- plied to a camera lens ( n g = 1 . 7 ). The coating is designed to reflect wavelengths at the blue end of the spectrum and transmit wavelengths in the near infrared. What minimum thickness gives high reflec- tivity at 526 nm? Answer in units of nm. Question 2, chap 35, sect 1. part 2 of 2 10 points What minimum thickness gives high trans- mission at 1052 nm? Answer in units of nm. Question 3, chap 35, sect 1. part 1 of 1 10 points An air wedge is formed between two glass plates separated at one edge by a very fine wire as shown. When the wedge is illuminated from above by 692 nm light, 23 dark fringes are observed. The count here includes the dark fringe at the contact point. Calculate the radius of the wire. Answer in units of m. Question 4, chap 35, sect 2. part 1 of 1 10 points Light of wavelength 552 nm is used to cali- brate a Michelson interferometer. By use of a micrometer screw, the platform on which one mirror is mounted is moved 0 . 232 mm. How many fringe shifts are counted? A fringe shift represents the change in going from a minimum to the adjacent maximum or from a maximum to the adjacent minimum. Question 5, chap 35, sect 3. part 1 of 2 10 points The second-order bright fringe ( m = 2) is 4 . 88 cm from the center line. 4 . 88cm 1 . 14 m . 029mm S 1 S 2 viewing screen Determine the wavelength of the light. Answer in units of nm. Question 6, chap 35, sect 3. part 2 of 2 10 points Calculate the distance between adjacent bright fringes....
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