Which statement is correct? Light can travel in a vacuum, and it travels faster if the light source is moving. Light can travel
in a vacuum, and its speed is constant if the source is moving or stationary. Light can travel in a vacuum and will travel faster if the light source is moving. Light can travel in a vacuum, and it travels more slowly if the light source is stationary.
<span>The correct statement is: Light can travel in a vacuum, and its speed is constant if the source is moving or stationary. Light isn't effected by a vacuum. </span>
The difference between granites and basalts is in silica content and their rates of cooling. A basalt is about 53% SiO2, whereas granite is 73%. Intrusive, slowly cooled inside the crust.