Suppose a light wave travels 600 meters while its electric and magnetic fields c

Question

Suppose a light wave travels 600 meters while its electric and magnetic fields cycle or oscillate 3 times. What is the wavelength of this light?
A. Can't tell

B. 600 meters

C. Infinity
D. 300 Meters

E. 200 meters

would this be 200 meters

The speed of light in a vacuum is a calculated using the magnetic permeability of free space (a vacuum is free space), ?0, and the electric permittivity of free space, ?0. Both of these things are constants so the speed of light in a vacuum must also be a constant (have an unchanging value) through all of the vacuum in space. We have special symbol for this constant: c. Now suppose you are floating out in the vacuum of space, in a spacesuit, and another person is moving toward you at 500 million miles per hour. If this person shines his laser pointer at you, at what speed does the laser light leave him and at what speed does it arrive at you?
A. it leaves the other guy at c and arrives to you at c + 500,000,000

B. it leaves the other guy at c + 500,000,000 and arrives to you at c

C. it leaves the other guy at c and arrives to you at c

D. it leaves the other guy at c + 500,000,000 and arrives to you at 500,000,000

E. None of the above

Which of the following means that the spread (divergence) of any magnetic field is zero anywhere in the universe at all times

A. ?x E = -?B/?t

B. ?x B = ?0J + ?0?0?E/?t

C. ?

Explanation / Answer

1) E. 200 meters.....you are correct

2) C. it leaves the other guy at c and arrives to you at c...light's speed is not relative

3) C. ?

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