A 360-nm thick oil film floats on the surface of a pool of water water. The indices of refraction of the oil and the water are 1.5 and 1.33, respectively
When the surface of the oil is illuminated from above at normal incidence with white light, what are the two wavelengths of light between 400 nm to 800 nm wavelength that are most strongly reflected?
A) 430 nm and 720 nm
B) 450 nm and 740 nm
C) 490 nm and 780 nm
D) 410 nm and 700 nm
E) 470 nm and 760 nm
A
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A 1.0-m long wire is carrying a certain amount of current. The wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.60 N, what is the magnitude of the current moving through the wire?
A) 2.0 A B) 1.0 A C) 3.0 A D) 4.0 A E) 5.0 A
Lobsters live on the bottom of the ocean, which means their density is
A) greater than the density of sea water. B) equal to the density of sea water. C) less than the density of sea water.
At a certain instant in time, the field of an electromagnetic wave in a vacuum points in the -z direction, and the field points in the +y direction. In what direction is this wave traveling?
A) +x direction B) -x direction C) +y direction D) -z direction E) +z direction
Thermodynamic Processes: When a gas expands adiabatically,
A. the internal (thermal) energy of the gas decreases. B. the internal (thermal) energy of the gas increases. C. it does no work. D. work is done on the gas. E. the temperature of the gas remains constant.