1. Could know that a filter blocks some colours Should know that a filter lets some colours through Must know that white light is a mixture of the three primary colours

2. White light Red light comes through Red filter Blue light absorbed Green light absorbed

3. White light Green light comes through Green filter Blue light absorbed Red light absorbed

4. White light Blue light comes through Blue filter Red light absorbed Green light absorbed

5. White light Cyan light comes through Cyan filter Red light absorbed

6. White light Magenta light comes through Magenta filter Green light absorbed

7. White light Yellow light comes through Yellow filter Blue light absorbed