Question

The amount of Photosynthetically active radiation captured by plants is

• A. 12 - 20 percent
• B. 20 - 30 percent
• C. 2 - 10 percent
• D. 60 - 70 percent

Answer 1

The Correct Option is C

Photosynthetically Active Radiation (PAR) refers to the range of wavelengths of light that are used by plants for photosynthesis. It includes primarily the visible light spectrum (400-700 nm). When light strikes a plant, only a portion of it is absorbed by the chlorophyll pigments in the plant's cells for the process of photosynthesis.

On average, plants are capable of capturing and utilizing around 2 to 10 percent of the incoming PAR for photosynthesis. The remaining percentage of light is either reflected or transmitted through the plant. The efficiency of light capture and utilization can vary depending on various factors such as plant species, environmental conditions, and the availability of other resources like water and nutrients.

Answer 2

Yes, the amount of Photosynthetically Active Radiation (PAR) captured by plants is approximately 2 - 10% of the total solar radiation received by Earth.

Explanation:

PAR refers to the portion of sunlight (wavelengths 400-700 nm) that plants use for photosynthesis.

Out of the total solar energy, only about 1-5% is converted into chemical energy by primary producers.

The efficiency of light capture and conversion varies based on factors like plant species, leaf structure, and environmental conditions.

Thus, plants typically capture and utilize 2-10% of PAR for photosynthesis