In the visible spectrum, what percentage of visible light rays accounts for natural sunlight?

In the visible spectrum, what percentage of visible light rays accounts for natural sunlight?

• A. 10%
• B. 35%
• C. 50%
• D. 85%

Answer: (B)

Sunlight covers a range of wavelengths from infrared through visible to ultraviolet. The portion that falls within the visible range—the light we can see—makes up roughly one third of the sun’s energy reaching Earth. That puts it around 35%. So the best answer reflects that the visible part is about a third, not as low as 10%, not as high as 50% or 85%.

Sunlight covers a range of wavelengths from infrared through visible to ultraviolet. The portion that falls within the visible range—the light we can see—makes up roughly one third of the sun’s energy reaching Earth. That puts it around 35%. So the best answer reflects that the visible part is about a third, not as low as 10%, not as high as 50% or 85%.