Question

Which of the following is a true statement A. The speed of an EM wave depends on its frequency. B. EM waves move faster in a medium than in a vacuum. C. The speed of an EM wave depends on the motion of the source. D. The fastest possible speed is the speed of light in a vacuum.

Answer 1

Answer:Wave characteristics QC

1.As frequency of a wave increases it’s speed increases as well.

2.The index of refraction of a material describes how light refracts when it interacts with that material.

3.They ensure that the electrons on the surface of the cells are able to absorb the energy of photons in high frequency wave.

4.X-rays are used to see inside the human body.this is possible because x-rays can pass through tissues in the human body due to their higher energy and lower wavelength.

5.The transmitter encodes information that it detects using different amplitudes and frequencies of radio waves.then it sends that information to the receiver

Step-by-step explanation:

Answer 2

D is correct as EM waves, like light, travel at a speed of 3 × 10⁸ m/s in a vacuum and travels slower in a medium.