SP212‐Spring‐2016 CH‐35‐B Assignment First do the following Wiley‐Plus assignment: Assignment #35b After completing the Wiley‐Plus, in your homework notebook, complete the following problems: CH35 Questions # 11 and 12. CH35 Problems # 35, 36, and 80. To check your work, the answers to the odd problems are in the back of the book. The answers to the even problems are: #36) a) four values in range (672nm, 480nm, 373nm, and 305 nm.) b) three values in range (560nm, 420nm, and 336nm.) #80) L=5.2μm. Homework Then complete the attached worksheets: (Note: the above problems were designed to ensure you have the skills to solve the worksheet problems. It is imperative to your learning of the problem solving technique to do the above problems BEFORE attempting the worksheet problems. You are graded on both! Homework notebooks are graded.) CH‐35‐B‐1: For each of the equations below, 1) State what each term is in your own words … 2) What the units of each term are… 3) What is the general use of that equation in your own words? A. 2L  m  n2
B. 2L  (m  1 )  2 n2
C.
Finishthefollowingsentences:
Reflectionfromhightolowindexofrefractioncausesa_________________.
Reflectionfromlowtohighindexofrefractioncausesa_________________. D. True or False: Equation A is always used for constructive interference. True or False: Equation B is always used for destructive interference. True or False: You must always draw a picture and determine the initial conditions for thin film problems before you chose which equation to used based on the question asked.
E. N  2d
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CH‐35‐B‐2: A soap bubble of refractive index 1.33 is floating in air. A cross section of a portion of the bubble wall is shown in the diagram. If a wavelength of 600 nm is strongly reflected perpendicular to the surface of the bubble, the thickness of the bubble wall is closest to: A. 152 nm. B. 189 nm. C. 226 nm. D. 279 nm. E. 338 nm. Show all work CH‐35‐B‐3: A soap bubble 250 nm thick is illuminated by white light normally incident. The index of refraction of the soap film is 1.36. a. Which color (ROYGBIV) is definitely not seen in the reflected light, based on calculations? b. Make an educated guess, based on calculations, as to the color of light (ROYGBIV) that is the most strongly reflected. Air Soap (n=1.36) Air Show all work (Including the range used for visible light): CH‐35‐B‐4: Use the following diagram to answer the following parts of this question: Air Soap (n=1.40) Water (n=1.33)
a. A thin Soap layer on water produces enhanced reflection through constructive interference at wavelength 600nm when light is normally incident from air. The refractive indices of the Soap and water are 1.40 and 1.33, respectively. The second smallest thickness of the Soap layer is closest to: Show all work b. Assume instead that the Soap film was of thickness 600‐nm‐thick and has an index of refraction of n = 1.40. It is illuminated with white light in a direction perpendicular to the film. For how many different wavelengths in the visible light spectrum (430nm‐690nm) are there fully constructive interference and what are those wavelengths? Show all work CH‐35‐B‐5: a) In a Michelson interferometer, 1000 fringes of 400.0 nm light pass by a reference. The
distance that the mirror M1 moves is closest to: A. 0.60 mm.
B. 0.40 mm.
C. 0.30 mm.
D. 0.20 mm.
E. 0.10 mm. Show all work b) Next a glass sheet with index of refraction n = 1.500 is inserted into the path of M1 and the mirror is moved that same amount as above while observing the interference pattern shifting by 1007 fringes, what is the thickness L of the glass sheet? Show all work