Which of the following statements are true? (select all that apply.)
(a) at any time,...
Which of the following statements are true? (select all that apply.)
(a) at any time, the electric and magnetic field lines are parallel to each other.
(b) all moving electric charges give rise to electromagnetic waves.
(c) electromagnetic waves can exert forces on charged particles that they encounter.
(d) the intensity of the wave drops off as 1/r.
(e) electromagnetic waves are produced when changing electric fields which produce magnetic fields which are also changing, thus producing a changing electric field, and so on.
(f) the direction of v can be found using the right-hand rule. put your four fingers along e, sweep them in the direction of b and your thumb will point along v.
(g) electromagnetic waves carry energy and momentum.
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