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自然老師劉翔|國中生物|理化|地科|會考 on Instagram: "📣【段考翔翔來救你🔥|顯微鏡重點一次搞懂】 考前看這篇就夠 💪 🔹一、常見狀況與調整方式 📍視野太亮或暗 → 調整光圈。 📍視野亮度不均 → 調整反光鏡。 📍視野模糊 → 先轉粗調節輪,再用細調節輪微調到最清楚。 (記得先用低倍鏡,清楚後再換高倍鏡!) 📍看不到物體 → 檢查看看是不是鏡頭沒對準載台中央孔洞,或是載玻片位置歪掉了,重新對準就好。 📍標本有氣泡 → 用針尖輕輕壓蓋玻片邊緣,氣泡就能排出。 (動作要輕,別把玻片戳破喔~) ⸻ 🔹二、不同倍率下的觀察差別 高倍率時: 👉 目鏡短、物鏡長、視野變小、物體看起來變大、數量變少、亮度變暗。 低倍率時: 👉 目鏡長、物鏡短、視野變大、物體變小、數量變多、亮度變亮。 ✅ 小口訣: 「高倍:視小物大少暗、低倍:視大物小多亮」 一句背起來,選擇題直接穩拿分🔥 ⸻ 🔹三、正確使用顯微鏡步驟 1️⃣ 把玻片固定在載台上,對準圓孔。 2️⃣ 先轉低倍鏡對準。 3️⃣ 轉粗調節輪讓影像出現。 4️⃣ 用光圈調整亮度。 5️⃣ 看清楚後,再換高倍鏡觀察
2:59
自然老師劉翔|國中生物|理化|地科|會考 on Instagram: "📣【段考翔翔來救你🔥|顯微鏡重點一次搞懂】 考前看這篇就夠 💪 🔹一、常見狀況與調整方式 📍視野太亮或暗 → 調整光圈。 📍視野亮度不均 → 調整反光鏡。 📍視野模糊 → 先轉粗調節輪,再用細調節輪微調到最清楚。 (記得先用低倍鏡,清楚後再換高倍鏡!) 📍看不到物體 → 檢查看看是不是鏡頭沒對準載台中央孔洞,或是載玻片位置歪掉了,重新對準就好。 📍標本有氣泡 → 用針尖輕輕壓蓋玻片邊緣,氣泡就能排出。 (動作要輕,別把玻片戳破喔~) ⸻ 🔹二、不同倍率下的觀察差別 高倍率時: 👉 目鏡短、物鏡長、視野變小、物體看起來變大、數量變少、亮度變暗。 低倍率時: 👉 目鏡長、物鏡短、視野變大、物體變小、數量變多、亮度變亮。 ✅ 小口訣: 「高倍:視小物大少暗、低倍:視大物小多亮」 一句背起來,選擇題直接穩拿分🔥 ⸻ 🔹三、正確使用顯微鏡步驟 1️⃣ 把玻片固定在載台上,對準圓孔。 2️⃣ 先轉低倍鏡對準。 3️⃣ 轉粗調節輪讓影像出現。 4️⃣ 用光圈調整亮度。 5️⃣ 看清楚後,再換高倍鏡觀察
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