{"type":"product","schema_version":"1.0","item_id":"100480971945","canonical_url":"https://tw.bid.yahoo.com/item/100480971945","title":"【夜市王】電磁秋千 科技小製作 DIY物理實驗 益智拼裝玩具 電磁擺 49元","subtitle":null,"condition":"全新品","currency":"TWD","observed_at":"2026-04-24T18:26:12.715Z","current_price":49,"original_price":null,"stock_status":"in_stock","available_quantity":984,"sold_quantity":15,"seller":{"id":"Y4703356977","name":"夜市王","positive_rate":null,"rating_count":null},"images":[{"url":"https://img.yec.tw/ob/image/eca5ac50-2302-4283-bf2f-03d8514342b4.jpg","role":"main","alt":"商品主圖","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/1ff898b0-87a8-4279-ac87-cb9d68fcb678.jpg","role":"detail","alt":"商品圖片 2","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/8f205673-2c93-4321-8110-69cd63728e10.jpg","role":"detail","alt":"商品圖片 3","width":null,"height":null}],"description":"小製作之：電磁秋千\n\n本套件為插孔式，不需要膠水之類的配件。組裝方便，演示的效果更佳。\n\n    科學家伽利略在教堂裏看到吊燈被風吹的晃動，他用測量脈搏跳動的方法，首先發現了不管擺的擺幅大小，其週期基本不變這一現象。後來的數學家從理論上證明了這一點，物理學家惠更斯根據這一原理研製了擺鐘。電磁秋千像個擺，不管秋千的擺幅大小，來回擺動的週期基本不變，接通電源後秋千擺動，當擺幅越來越大後，達到一定擺幅，你可觀察到不管秋千的擺幅多大，秋千來回擺動的時間基本不變，這就是單擺的週期不變性原理。","shipping_methods":[{"name":"7-ELEVEN取貨付款","fee":0,"currency":"TWD"},{"name":"郵局掛號","fee":0,"currency":"TWD"},{"name":"萊爾富取貨付款","fee":0,"currency":"TWD"}],"lowest_shipping_fee":null,"payment_methods":["ATM轉帳","萊爾富取貨付款","7-ELEVEN取貨付款"],"category_id":"2092074499","category_name":"組合式","breadcrumb":[{"id":"25464","name":"玩具、模型與公仔","url":"/tw/%E7%8E%A9%E5%85%B7%E3%80%81%E6%A8%A1%E5%9E%8B%E8%88%87%E5%85%AC%E4%BB%94-25464-category.html"},{"id":"2092074497","name":"益智遊戲/玩具","url":"/tw/%E7%9B%8A%E6%99%BA%E9%81%8A%E6%88%B2-%E7%8E%A9%E5%85%B7-2092074497-category.html"},{"id":"2092074499","name":"組合式","url":"/tw/%E7%B5%84%E5%90%88%E5%BC%8F-2092074499-category.html"}],"view_count":0,"watch_count":3}