[問題] 台電雇員物理103年26.29題
26.水中有聲源,在水中產生頻率F、波長A並傳播至空氣。
則在空氣中變化為?
我選F不變A變大。 答案為F不變A變小。
請問為何呢?
29.凸透鏡其凸面取率半徑10CM,則焦距為多少?
這題完全不知道。只知道球面鏡的。
請問有公式或推導嗎?
謝謝各位!!
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09/16 00:05, , 1F
09/16 00:05, 1F
推
09/16 00:12, , 2F
09/16 00:12, 2F
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09/16 00:16, , 3F
09/16 00:16, 3F
推
09/16 00:21, , 4F
09/16 00:21, 4F
→
09/16 00:21, , 5F
09/16 00:21, 5F
→
09/16 00:23, , 6F
09/16 00:23, 6F
→
09/16 00:28, , 7F
09/16 00:28, 7F
推
09/16 00:33, , 8F
09/16 00:33, 8F
→
09/16 00:34, , 9F
09/16 00:34, 9F
→
09/16 00:34, , 10F
09/16 00:34, 10F
→
09/16 00:36, , 11F
09/16 00:36, 11F
推
09/16 00:44, , 12F
09/16 00:44, 12F
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09/16 00:44, , 13F
09/16 00:44, 13F