Photosynthesis will not happen in the absence of sunlight or at night. However artificial light of the correct intensity can substitute for sunlight to initiate photosynthesis. Ask your own question! Sunlight is the source of energy for photosynthesis, and the first set of reactions begin the process requires light.

Sunlight is the source of energy for photosynthesis, and the first set of reactions begin the process requires light. Photosynthesis will not happen in the absence of sunlight or at night.

Without sunlight, the light-dependent reactions cannot occur as there is no light energy to convert into chemical energy. This means that the Calvin Cycle cannot proceed as it relies on the products of the light-dependent reactions. Therefore, without sunlight, photosynthesis cannot occur.

Plants need sunlight for a process that we call photosynthesis. Plants are what we call autotrophs, meaning they’re self-feeding or self-nourishing. They basically create their own food or energy to grow.

Researchers have developed an electrocatalytic process to allow plants to undergo photosynthesis without sunlight. This form of artificial photosynthesis may increase the efficiency with which food crops are raised. It is well understood that plants need water, carbon dioxide and sunlight to grow.