Pho-tn̂g
Pho-tn̂g (Eng-gí: wavelength) tī bu̍t-lí-ha̍k siōng, sī chiàⁿ-hiân-pho pho-tōng ê khong-kan chiu-kî, iā tiō sī pho-tōng hêng-thé têng-ho̍k ê hn̄g-kīn (distance).
 | Pún bûn-chiuⁿ sī chi̍t phiⁿ phí-á-kiáⁿ. Lí thang tàu khok-chhiong lâi pang-chō͘ Wikipedia. |