Which of the following statements best describes an electromagnetic wave with a long wavelength?
question 5 options:
it has a low frequency and can travel through a vacuum.
it has a high frequency and can travel through a vacuum.
it has a low frequency and can only travel through a medium.
it has a high frequency and can only travel through a medium.
which of the following statements best describes a difference between mechanical waves and electromagnetic waves?
question 6 options:
mechanical waves can produce colored light, while electromagnetic waves cannot.
mechanical waves can travel in any direction, while electromagnetic waves travel only in one direction.
mechanical waves travel only through a medium, while electromagnetic waves can also travel through a vacuum.
mechanical waves travel only at the speed of light, while electromagnetic waves can travel at many different speeds.