水大
水乾 |
潮,學術上又叫潮汐,係指海面水漲水落嘅現象,原因係地球受到太陽同月球嘅萬有引力(叫潮汐力)影響。水漲時叫水大或者潮漲;水落時叫水乾或者潮退。
當太陽、月光、地球依此次序排成一線(新月),由於太陽同月球嘅引力喺同一方向拉,海水會升得特別高。當月球、地球同太陽三者依此次序連成一線時(望月/滿月),情況一樣,就係大潮。大潮時引起嘅浪,叫大潮浪。
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