Question

NEED HELP TODAY

Which of the following is true about the speed of light?
A. It depends on the wavelength
B. In a vaccum, it is a constant value that does not depend on the observer
C. It is the slowest in a vacuum unless the observer is moving towards the source
D. In a vacuum, it varies depending on the color of the light

Answer 1

B- It is a constant when the light is traveling in a vacuum.

Step-by-step explanation:

"Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles)

Answer 2

I am pretty sure it is B My friend hope you are well

Step-by-step explanation: