A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at l = 450 nm and a brightness minimum at l = 600 nm. What is the thickness of the oil film?
343.5 nm
You might also like to view...
Chloroplasts are found in the cells of which of the following organisms?
a. Clams b. Tulips c. Parrots d. Starfish
Out of the five common rock-forming minerals (silicates, carbonates, oxides, sulfides, and sulfates), which two form economically important ores?
What will be an ideal response?
Suppose you released a single proton from rest at some point X in an electric field, and that you then released a single electron from rest at the same point X
How would the motions of the proton and electron compare, just after their release from rest? A) They would move in opposite directions, and the proton would move fastest. B) They would move in the same directions, and the electron would move fastest. C) They would move in the same directions, and the proton would move fastest. D) They would move in opposite directions, and the electron would move fastest. E) They would move in opposite directions, and at the same speeds.
In a steam engine, steam at 140°C in a turbine does work on an external system, and the steam leaves the turbine at 100°C. The efficiency of the steam engine is 5%. The relevant physical principle is the __________ law of thermodynamics
Fill in the blank(s) with correct word