Light of wavelength 425.0 nm in air falls at normal incidence on an oil film that is 850.0 nm thick. The oil is floating on a water layer 15 cm thick
The refractive index of water is 1.33, and that of the oil is 1.40. You want to add oil so that light reflected off of the top of the oil film will be canceled. What is the minimum distance that you should INCREASE the oil film?
A) 121 nm B) 152 nm C) 75.9 nm D) 106 nm E) 60.7 nm
E
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Indicate whether the statement is true or false
Total Internal Reflection: The critical angle for a substance in air is measured at 53.7°. If light enters this substance from air at 45.0° with the normal, at what angle with the normal will it continue to travel?
A. 34.7° B. 45.0° C. 53.7° D. It will not continue, but will be totally reflected.
Wave Characteristics: A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the lowest frequency associated with this portion of the spectrum? (c = 3.00 × 108 m/s)
A. 1.50 × 1014 Hz B. 7.50 × 1013 Hz C. 7.50 × 1014 Hz D. 7.50 × 1015 Hz E. 1.50 × 1015 Hz
What are oxidation reactions?
A) reactions that produce oxygen atoms B) reactions that destroy oxygen atoms C) reactions that remove oxygen from the atmosphere, such as fire and rust D) reactions that convert CO2 to O2 E) all of the above, i.e., any reaction involving oxygen