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Seeing needs light entering the eye - Online practice 1
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Seeing model: light from lamp reaches a non-luminous book; some light reflects from it into an eye. Non-luminous means the object is not making its own light in this situation. In air, the simple model uses straight paths between interactions. This is a paper task: never look at the Sun or aim lights into eyes.
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