Question

which of the following is not a characteristic of electromagnetic light waves?
a) they cant travel through a vacuum.
b) they obey the formula: velocity = wavelength × frequency.
c) they travel at the same speed through any one material.
d) they can be reflected and refracted.
question 7 (5 points)

Explanation:

Electromagnetic light waves can travel through a vacuum (at the speed of light $c \approx 3 \times 10^8$ m/s), so option A describes a non-characteristic. All electromagnetic waves follow the wave equation $v = \lambda \times f$, travel at a constant speed in a uniform material, and exhibit reflection/refraction.

Answer:

A) They can't travel through a vacuum.