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A b f f - PowerPoint PPT Presentation

Lenses

Lenses. Eyeglasses. Peep-hole. Watch. Camera. Security mirror. Magnifying glasses. 1 In daily life, you may have come across lenses that are thicker or thinner in the middle. Which of the following items do you think may contain lenses ?. ?. ?. ?. ?. ?.

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Lenses