The angle at which a wave strikes a surface is ___ the angle at which the wave is reflected.

Which is correct
A.) equal to
B.) smaller than
C.) larger than
D.) perpendicular to

a)equal to

Explanation:

properties of a wave

applies in reflection

others include:refraction,diffraction,interference

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

there are no contact forces mentioned on the list of choices that you've provided.