Does the colour of the paper appear to change?
Yes, the colour of the white paper appears to change when viewed through coloured transparent materials. When looking through a blue plastic or glass, the white paper appears bluish. When looking through a yellow plastic or glass, the white paper appears yellowish. The coloured transparent material acts like a filter and changes how we perceive the colour of objects seen through it.
Explanation
Activity 4 on Page 7 explores how coloured transparent materials affect what we see. When white paper is viewed through coloured transparent bags, bottles, or thin cloth, the colour appears to change because the coloured material filters the light passing through it. This demonstrates how transparent materials can interact with light.