Answer:
The wavelength and the intensity of light are not directly related. The wavelength is directly related to the energy of the light—shorter wavelengths are higher energy and longer wavelengths are lower energy. (This is why ultraviolet, x-ray and gamma ray light can be harmful, causing sunburns or cancers, while radio waves and infrared light aren’t usually a big deal.)
A bit over a century ago it was thought that the intensity of the light would determine the amount of energy it carried, so it was thought that a very bright red lightbulb would have more energy than a very dim blue light bulb. But it turned out that is not the case. The photoelectric effect is the phenomena where shining a light on a metal can cause the metal to eject free electrons, which is related to how solar panels work (the photovoltaic effect). But in the late 1800s & early 1900s it was discovered that it wasn’t how bright the lightbulb was that determined the electrons ejected from the metal, it was the color of the lightbulb.
The brightness is the intensity, whereas the color is the wavelength. So you can make light with any wavelength you want, and make it more or less intense by making it brighter or dimmer. Which is why the two aren’t really related to one another
