A thin layer of oil (n = 1.25 ) is on top of a puddle of water (n = 1.33). If normally incident 500-nm light is strongly reflected, what is the minimum nonzero thickness of the oil layer?
A) 100 nm B) 150 nm C) 250 nm D) 200 nm E) 400 nm
D
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Thin Films: A soap bubble film that is 106 nm thick and has an index of refraction of 1.42 results in constructive interference in the reflected light if this film is illuminated by a beam of light with a wavelength of 601 nm. What are the next three thicknesses of this film that will also result in constructive interference?
A. 212 nm, 318 nm, 424 nm B. 53.0 nm, 35.3 nm, 26.5 nm C. 212 nm, 424 nm, 636 nm D. 67.0 nm, 42.4 nm, 22.3 nm E. 318 nm, 530 nm, 742 nm
As viewed from any place within the continental United States, noon on apparent solar time is defined as the moment when the Sun is
A) directly south. B) directly overhead. C) ante meridiem. D) at a right ascension of 0 hours.
Which of the following most likely explains why Venus does not have a global magnetic field like Earth?
A) It does not have a metallic core. B) It has too thick of an atmosphere. C) Unlike Earth, Venus does not have a liquid outer core. D) Its rotation is too slow.
One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900°C; exhaust temperature = 430°C. 7.0 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour
What is the power output, in hp, of this engine?