Photosynthetically active radiation (PAR) represents the following range of wavelengths:
1. 450-950 nm
2. 340-450 nm
3. 400-700 nm
4. 500-600 nm 

Photosynthetic Active Radiation (PAR) has the following range of wavelengths
1. 340-450 nm
2. 450-950 nm
3. 500-600 nm
4. 400-700 nm 

Which of the following absorbs light energy for photosynthesis:
1. Chlorophyll
2. Water molecule
3. O₂
4. RUBP