Thin Films: A soap bubble has an index of refraction of 1.33. What minimum thickness of this bubble will ensure maximum reflectance of normally-incident light having a wavelength of 530 nm?
A. 24.9 nm
B. 76.9 nm
C. 99.6 nm
D. 199 nm
E. 398 nm
Answer: C
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Approximately how many other planetary systems have been discovered to date?
A) tens B) hundreds C) thousands D) tens of thousands E) millions
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What will be an ideal response?
San Francisco Chef Manual rates the energy content of foods in units of
A) calories. B) Calories. C) joules. D) Celsius degrees.