Long description

This figure illustrates the multiplication of a vector E by a scalar q. An orange arrow representing the vector E points to the right. A blue arrow is labelled ‘vector F equals q times vector E, open bracket q greater than zero close bracket’. This blue arrow points in the same direction as vector E. A second blue arrow is labelled ‘vector F equals q times vector E, open bracket q less than zero close bracket’. This blue arrow points in the opposite direction to vector E. The two blue arrows are a different length to the vector E but the same length as each other.