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.
A 3D mouse is a pointing and control device specialized for movement in virtual 3D (three-dimensional) environments. 3D mouse devices have used a number of different means to control 3D movement as well as 2D pointing, including multi-axis sensors, accelerometers, IR lights and IR sensors. A number of computer pointing devices and game controllers could be considered 3D mice.