Ultra Violet Flashcards
1
Q
What is visible light used for
A
It is used to see different colors depending on the wavelength
2
Q
How is visible light used in communication
A
It is used in optical fibers which send pulses of light over long distances and when received, can be interpreted
3
Q
2 ways UV light is used
A
- Security: Can be used to write codes that are completely invisible unless we shine a UV light on them. This is done to make something very difficult to forge or replicate
- Sterilize water: UV Light destroys microorganisms
4
Q
What is Fluorescence
A
Fluorescence is a property of certain chemicals where UV light is absorbed and then the energy is re-emitted as visible light
