the order of leW wtcchs B. Assume the index of refraction of flint glass is 1.66
ID: 1871793 • Letter: T
Question
the order of leW wtcchs B. Assume the index of refraction of flint glass is 1.66 and the index of refraction of crown glass is 1.52 (0) A film formed by one drop of sassafras oil, on a horizontal surface of a flint glass block, is viewed by reflected light. The film appears brightest at its outer margin, where it is thinnest. A film of the same oil on crown glass appears dark at its outer margin. What can you say about the index of refraction of the oil? (a) It must be less than 1.52 (b) It must be between 1.52 and 1.66 (c) It must be greater than 1.66 (d) None of statements (a) through (c) is necessarily true. Could a very thin film of some oher ld apper bright by refdlightonhoth of the plass blocks? (ii) Could it appear dark on both? (iv) Could it appear dark on fint glass and bright on crown glass? Experiments deseribed by Thomas Young suggested this question. C. Why can you hear around corners, but not see around them? Observe the shadow of your book when it is held a few inches above a table with a small lamp several feet above the book. Why is the shadow somewhat fuzzy at the edges? D.Explanation / Answer
B1 It refrective index must be in between 1.52 to 1.66 as phase is shifted by 1800
2. yes it is possible if refrective index of oil is less than both glass
3 yes if refrective index is greater than both of glass
4 it is possible if refrective index of oil is less than flint glass but more than crown glass
C. Because sound waveis mechanical wave and travel in all direction where as light wave is electromagnetic wave and travvel only in one direction
D. Because of deffrection of light on its corner
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