What percent of visible radiation accounts for total solar radiation incident on top of the atmosphere?

Correct option is B

Explanation:
The visible radiation accounts for approximately 41% of the total solar radiation incident at the top of the Earth's atmosphere. The total solar spectrum consists of three main components:
1. Ultraviolet (UV) Radiation (~8%)
2. Visible Light (400-700 nm) (~41%)
3. Infrared Radiation (IR) (~51%)
At the top of the atmosphere, about 41% of the incoming solar energy falls within the visible spectrum (400-700 nm), which is crucial for photosynthesis and various biological processes. However, as it passes through the atmosphere, some of it gets scattered and absorbed, increasing the proportion of infrared radiation at the Earth's surface.
Information Booster:
· Solar radiation spectrum: Composed of UV, visible, and infrared radiation.
· Solar Constant: The total energy received per unit area at the top of the Earth's atmosphere is about 1361 W/m².
· Photosynthetically Active Radiation (PAR): The portion of sunlight (400-700 nm) used for photosynthesis, forming a significant part of visible light.
· Infrared Radiation (IR): Makes up ~51% of total solar radiation and plays a key role in Earth’s heat balance.
· Albedo Effect: Reflection of solar radiation by clouds, ice, and surfaces affects the proportion of radiation reaching the Earth's surface.
· Rayleigh Scattering: Shorter wavelengths (blue light) scatter more, making the sky appear blue.
Additional Information:
· Visible Light (b) is essential for plant photosynthesis and human vision.
· Infrared Radiation (IR) is responsible for the greenhouse effect and warming the Earth's surface.
· Ultraviolet Radiation (UV) can cause skin damage but is crucial for vitamin D synthesis.
· The atmosphere absorbs much of the UV and infrared radiation, altering the proportion of light that reaches the Earth's surface.