[問題] 透鏡光學問題
9 A certain lensometer manufactured to have a standard lens of +20.00D was
accidentally fitted with a +25.00D standard lens. With the target in focus,
the wheel was adjusted to read zero power when no lens was before the stop,
if a +12.50-D lens is placed before the lens stop ,what will be the reading
on the wheel with the target again in focus?
我解釋一下lensometer是什麼東西...
lensometer是鏡片驗度儀,是個可以檢測鏡片度數的儀器,常見於眼鏡店
這個題目的意思是說,原本驗度儀的標準中和鏡片是+20.00D,現在換成一個+25.00D的,
現在已做好歸零的設定,也沒有任何的鏡片在上面。 現在有一片+12.50D的鏡片被放在上
面,此鏡片的讀數會變成多少?
解答是寫+9.14D,但是我求不出此解
有請版上高手解答 感恩
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※ 編輯: handsomeniu 來自: 122.118.17.248 (06/04 21:22)