Question

Select the best answer from the choices below. Standing waves are formed by:

a
A wave hitting the surface of an object and bouncing back
b
Light moving from one medium to another
c
Two or more identical waves moving in opposite directions
d
Waves moving around an obstacle

Answer 1

I think it is c

Step-by-step explanation:

Answer 2

c

the correct answer should be c :))
hope this helps you