Surface albedo is defined as the ratio of radiosity Je to the irradiance Ee (flux per unit area) received by a surface.
sˈɜːfɪs ælbˈiːdoʊ ɪz dᵻfˈaɪnd æz ðə ɹˈeɪʃɪˌoʊ ʌv ɹˌeɪdɪoʊsˈɪɾi dʒˈiː tə ðɪ ˈɪɹeɪdˌiəns ˈiː flˈʌks pɜː jˈuːnɪt ˈɛɹiə ɹᵻsˈiːvd baɪ ɐ sˈɜːfɪs.