Red light has wavelengths in the range 622-780 nm.
frequency = speed of light/wavelength
For any wave, (wavelength) times (frequency) = (speed of propagation).For electromagnetic waves, (wavelength) times (frequency) = (speed of 'light')
from the top of one wave to the top of the next
The product of both is equal to the speed of the wave.
Wave Speed multiplied by Wave Period = Wavelength
Radio waves.
Red light shining on an object that reflects primarily red light will be red
Red appears red when light falls on it because objects reflect certain wavelengths of light while absorbing others. In the case of red, the object reflects red wavelengths of light and absorbs other colors. This reflected red light is what our eyes perceive as the color red.
A transparent red object would transmit red light while absorbing other colors of light.
The red light is absorbed by the red apple, while the green light is reflected. This is because the red apple appears red because it absorbs all colors of light except red, which it reflects.
When light hits a red object, the object absorbs all colors of light except for red. Red light is reflected off the object and that is what we perceive as the object's color.
Pink is light red.