白光与颜色

解释白光是由所有可见颜色（ROYGBIV）混合而成的；描述白光通过棱镜发生色散的现象；解释物体为什么呈现颜色（波长的选择性反射与吸收）；并描述用滤光片进行颜色混合。

Explain that white light is a mixture of all visible colours (ROYGBIV), describe dispersion through a prism, explain why objects appear coloured (selective reflection and absorption of wavelengths), and describe colour mixing with filters

学习证据 / Evidence

• 按频率从低到高列出可见光谱中的颜色
• 解释棱镜为什么能把白光色散成光谱
• 解释为什么红色物体在白光下看起来是红色，而在蓝光下看起来是黑色
• 预测物体透过彩色滤光片呈现的颜色

• Lists the colours of the visible spectrum in order of increasing frequency
• Explains why a prism disperses white light into a spectrum
• Explains why a red object looks red under white light but black under blue light
• Predicts the colour of an object seen through a colour filter

评估问题 / Assessment

如果{{name}}让白光透过棱镜，能解释为什么会出现彩虹般的颜色吗？接着，能预测蓝色毛衣在红色灯光下会是什么颜色，并说明原因吗？

If {{name}} shone white light through a prism, could they explain why a rainbow of colours appears — and then predict what colour a blue jumper would look under red light and why?