Nước trong chậu cao 40cm, chiết suất 4/3. Trên nước là lớp dầu cao 30cm, chiết suất n=1,5. Mắt đặt trong không khí, cách mặt trên lớp dầu 50 cm thấy đáy chậu cách mình bao nhiêu?

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Đáp án:

cách mặt trên lớp dầu 50 cm thấy đáy chậu cách mình là 115cm

Giải thích các bước giải:

Ta có:

Δx=e.(1−n1n2)

Độ dịch chuyển ảnh của đáy chậu là: 

Δx=30.(1−11,5)+40.(1−1,543)=5cm

Đáy chậu cách mình:

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