Red is a primary color, you can't mix 2 to get red. Blue is primary, too, and so is yellow. You can mix any of the above colors to make another color. ie: red and yellow make orange. red and blue make purple. blue and yellow make green. yellow and green make light green. white and red make pink.
Difference between Optical Mouse and Laser Mouse. Key Difference: The optical mouse uses a light-emitting diode, while a laser mouse uses a laser in order to detect movement. A mouse is hardware that is required when trying to navigate on a desktop PC. However, many people these days also use a mouse on their laptops as it makes navigation easier.
1 Mechanical sensors within the mouse detect the direction the ball is rolling and move the screen pointer accordingly. 2  optomechanical: Same as a mechanical mouse, but uses optical sensors to detect motion of the ball. 3  optical: Uses a laser to detect the mouse's movement.