A student uses coloured filters and coloured cards in a dark room.
The student shines white light through a red filter. Only red light comes out of the filter.
Explain how the filter does this.
The student shines the red light from the filter onto three cards.
The Table shows the colour of each card in white light.
Table
| Card | Colour in white light | Colour in red light |
|---|---|---|
| 1 | white | .................... |
| 2 | blue | .................... |
| 3 | red | .................... |
Complete the Table to show the colour of each card in red light.
The student places a green filter in front of the red filter.
No light comes out of the green filter.
Explain why.
51 exam-style questions on OCR GCSE Physics 5.3 Wave interactions, covering 5.3.1 Wavelength and how substances affect waves, 5.3.2 Wave velocity in different substances, 5.3.3 Convex and concave lenses, 5.3.4 Ray diagrams for reflection and refraction, and 5.3.5 Colour, absorption and reflection. Each one has a worked solution and a mark scheme showing where the marks go.