Red tape appears red because it absorbs all colors of light except for red. The red light is then transmitted through the tape, which allows the taillight to shine red when the brakes are applied.
The pigment or dye used in the red tape selectively absorbs the wavelengths of light that are not red, thereby giving it the appearance of being red. This selective absorption and transmission of light is what creates the red color that we see when light passes through the tape.
When the red light passes through the tape and is emitted from the taillight, it appears as the familiar red color that indicates braking to other drivers on the road. This helps enhance visibility and communicate the driver's intentions to those around them, making the roads safer for everyone.