Question

Light exhibits the Doppler effect what does this tell us

A. Light has properties in common with other types of waves

B. Light and sound are the same types of waves

C. Light changes speed as we approach the source

D. Light is visible only under certain conditions

Answer 1

Answer: A. Light has properties in common with other types of waves

✔

Answer 2

A. Light has properties in common with other types of waves

Step-by-step explanation:

Indeed, light is a type of wave, so it also share properties common to other types of waves.

More specifically, light is part of electromagnetic waves. Electromagnetic waves consist of electric and magnetic fields that oscillate in a plane perpendicular to their direction of propagation (for this reason, they are also called transverse waves).

Electromagnetic waves, unlikely other waves, do not need a medium to propagate, so they can also travel through a vacuum.

Electromagnetic waves travel through a vacuum always at the same speed, called speed of light (
`c=3.0\cdot 10^8 m/s`).

Visible light is the term used to indicate the electromagnetic waves that we are able to see with our eyes: their range in wavelength is approximately from 380 nm (violet light) to 750 nm (red light).