Which of the following best describes electromagnetic waves?
O
A. Electromagnetic waves cause particles in a medium to vibrate
parallel to the direction of wave travel.
B. Electromagnetic waves are produced by a disturbance in electric
and magnetic fields.
O
C. Electromagnetic waves are produced by a disturbance in aur
medium.
D. Electromagnetic waves cause particles in a medium to vibrate
perpendicular to the direction of wave travel.

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.