Which statement gives the relationship between the waves in the electric and magnetic fields in an electromagnetic wave?
A) They are in phase and parallel with each other in space.
B) They are 90 degrees out of phase but parallel in space.
C) They are in phase but perpendicular to each other in space.
D) They are 180 degrees out of phase and random in their inclinations to each other.
E) They are in phase but opposite in direction of motion.
C
You might also like to view...
A heat pump uses 100 J of work to output 150 J of heat at some temperature. What is the heat that is withdrawn from some lower temperature?
A. 90 J B. 75 J C. 50 J D. 25 J
Differentiate between lossless and lossy compression. What is compression artifacting?
What will be an ideal response?
The critical density of the universe is the
A) average density the universe would need for gravity to someday halt the current expansion if dark energy did not exist. B) actual average density of the universe. C) density of dark matter in the universe. D) density of water.
A lab has a new material they must test in order to determine its nature. Which test will determine whether the substance is a conductor, insulator, or semiconductor?
1.A potential difference is applied; if the material conducts, it is a conductor. 2.A potential difference equivalent to 1 eV is applied; if the material conducts, it is a semiconductor. 3.An infinitesimal potential difference is applied to the material; if it doesn't conduct, it is an insulator. 4.A potential difference is applied to the material, beginning with a very small one and increasing to values equivalent to 5 eV. It can be identified based on when it begins to conduct.