ðə kwˈɔntəm jˈiːld ʌv fˌoʊɾoʊsˈɪnθəsˌɪs, wˌɪtʃ ɪz ˈɔːlsoʊ ðə fˌoʊɾoʊkˈɛmɪkəl kwˈɛntʃɪŋ ʌv flʊɹɹˈɛsəns, ɪz kˈælkjʊlˌeɪɾᵻd θɹuː ðə fˈɑːloʊɪŋ ᵻkwˈeɪʒən:
The quantum yield of photosynthesis, which is also the photochemical quenching of fluorescence, is calculated through the following equation: