简易英语科技丛书 光PDF电子书下载

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Introduction 5

How light travels 6

How light behaves 7

Shadows 9

Colours of light 11

Making colours white 14

Reflection of light 16

Uses of mirrors 19

The eyes 21

Parts of the eye 21

How the eyes work 23

Making pictures with a lens 27

A water drop microscope 28

A pin-hole camera 30

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