Light reaction is a process that occurs in the chloroplasts of plants and converts light energy into chemical energy in the form of ATP and NADPH¹². It involves the absorption of light by chlorophyll and other pigments in the thylakoid membranes of the chloroplasts, and the transfer of electrons through two photosystems (PSI and PSII) and an electron transport chain²³. Light reaction also produces oxygen as a by-product from the splitting of water molecules¹². Light reaction is the first stage of photosynthesis, which is the process by which plants make their own food using carbon dioxide and water¹²..

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