There are many factors that affect the the process of Photosynthesis, such as light, chlorophyll, temperature, carbon di-oxide and water. If any of these factors is affected, the rate of Photosynthesis also get affected.
Light:- Light energy trapped by the Chlorophyll is used to convert raw material into sugar.
Chlorophyll:- Chlorophyll is found in Chloroplasts. It enables the plant to trap the light energy.
Temperature:- The process of Photosynthesis can take place only at a suitable temperature between 20 degree C to 40 degree C.
Carbon dioxide:- The rate of Photosynthesis increases with an increase in the concentration of Carbon di-oxide.
Water:- Less than one percent of total water absorbed by the plant in process of Photosynthesis. Therefor water hardly affects the rate of Photosynthesis.