What type of light has longer wavelengths and makes up 60 percent of natural sunlight?

The correct answer is infrared light, which constitutes a significant portion of natural sunlight, accounting for about 60 percent of its total composition. Infrared light has longer wavelengths compared to visible light and ultraviolet light, which means it falls outside the range that the human eye can see. This radiation is primarily associated with heat; it is the part of sunlight that contributes to warming the Earth's surface and influences weather patterns.

While visible light is crucial for photosynthesis and allows us to see the environment around us, it only makes up a small portion of the total sunlight spectrum. Ultraviolet light, while having shorter wavelengths and being responsible for effects such as sunburn, represents a much smaller fraction of sunlight. Gamma rays, on the other hand, are part of the electromagnetic spectrum but have extremely short wavelengths and do not typically contribute to sunlight, posing risks due to their high energy levels and the potential for harm to biological tissues.