Q. Consider the following statements are correct with respect to photo synthetically active radiation:
1. Photo synthetically Active Radiation (PAR) is the amount of light available for photosynthesis.
2. The light wavelength range is needed for PAR is 400 nanometer (nm) to 700nm.
Which of the following given below codes is correct?
Photosynthetically Active Radiation (PAR) is the amount of light available for photosynthesis, which is light in the 400 to 700 nanometer wavelength range. PAR changes seasonally and varies depending on the latitude and time of day. Levels are greatest during the summer at mid-day. Factors that reduce the amount of PAR available to plants include anything that reduces sunlight, such as cloud cover, shading by trees, and buildings. Air pollution also affects PAR by filtering out the amount of sunlight that can reach plants. Photosynthetically Active Radiation is needed for photosynthesis and plant growth. Higher PAR promotes plant growth, and monitoring PAR is important to ensure plants are receiving adequate light for this process.
Source: ForumIAS
