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

What is the significance of the battle of saratoga? a. the defeat at saratoga allowed the british to invade new england by land. b. after the defeat at saratoga france refuse to sign a treaty with the united states. c. the british won a decisive victory at saratoga. d. after the victory at saratoga france gave open support to the united states including arms money and ships.