The magnetic field amplitude in an electromagnetic wave in vacuum is related to the electric field amplitude by B =
A.
.B.
.C.
D.
.E.
Answer: A
You might also like to view...
If protons have a half-life of 1031 years, what fraction of the original protons have decayed during the 101 year existence of the universe?
a. 1/31 b. 30/31 c. 4 × 10^–7.5 d. 4/10 e. less than any of the above values
The difference between a camera and the human eye is that a camera utilizes a fixed focal length lens and the eye does not
Indicate whether the statement is true or false
A package is dropped from a helicopter moving upward at 15 m/s. If it takes 16.0 s before the package strikes the ground, how high above the ground was the package when it was released if air resistance is negligible?
A) 810 m B) 1000 m C) 1200 m D) 1500 m
Which of the following best explains why nuclear fusion requires bringing nuclei extremely close together?
A) Nuclei are attracted to each other by the electromagnetic force, but this force is only strong enough to make nuclei stick when they are very close together. B) Fusion can proceed only by the proton-proton chain, and therefore requires that protons come close enough together to be linked up into a chain. C) Nuclei normally repel because they are all positively charged and can be made to stick only when brought close enough for the strong force to take hold. D) Nuclei have to be very hot in order to fuse, and the only way to get them hot is to bring them close together.