Question

How can yellow light be produced if only red and green light are available?

1) By mixing red and green light
2) By filtering red and green light
3) By adding blue light
4) Yellow light cannot be produced with only red and green light

Answer 1

Yellow light is produced by mixing red and green light, and this is due to color addition in the RGB color model. Red light has the longest wavelength and lowest frequency, while blue light has the shortest wavelength and highest frequency.

Step-by-step explanation:

Yellow light can be produced by mixing red and green light. When both red and green lights shine on a white paper, the colors combine and are perceived as yellow by our eyes. This is due to color addition, which is a part of the RGB (Red, Green, Blue) color model. In this model, various combinations of red, green, and blue light can create a wide spectrum of colors, including yellow. When red (~700 nm wavelength) and green (~550 nm wavelength) lights are mixed, they produce yellow light because our eyes interpret the combination of signals from the red and green sensitive cones as yellow.

Regarding the colors of light ordered by wavelength and frequency, red light has the longest wavelength and the lowest frequency, followed by yellow, and then blue having the shortest wavelength and the highest frequency. A photon's energy is directly proportional to its frequency, so blue light photons have the most energy followed by yellow, and red has the least.