Visible Light
Physics: Edexcel IGCSE, topic 3.3.5
Visible Light
Visible light is used to see the world around us.
Visible light spectrum
- Traditionally, we say that there are seven colours of light in the spectrum.
- Red, Orange, Yellow, Green, Blue, Indigo and Violet.
Uses
- We use visible light to see the world around us and in fibre optics.
Explanation
- We use visible light in optical fibres because it can be totally internally reflected.
- This means that we can transmit signals (information) along optical fibres without the signals (information) getting lost.
Test yourself on Visible Light
Which of these are in the 7 colours of the visible spectrum?
Which of these pairs has the highest frequency?