Video and lesson investigations on the topic of color. Key concepts include:
- In white light all colors from the visible spectrum can be seen.
- Only some colors can be seen through colored plastic.
- Some colored plastics only let one color (their own color) through.
- Other colored plastics let several colors through.
- Color ‘filters’ only let their component colors pass through.
- They absorb all of the other colors from white light.
- This is why they are called color ‘filters’. For example, red filters only let red light pass through them, blue only blue light,
- and green only green light.
- Orange filters let some yellow and some red through because the color orange is made up of partly yellow and partly red.
- The light we see is only part of the entire electromagnetic spectrum.
- Parts of this spectrum that are invisible to the naked eye include X-rays, ultraviolet rays and infra-red radiation.