Electromagnetic Waves: Visible Light, UV and X-rays
- Created by: Go
- Created on: 24-12-12 19:13
Other questions in this quiz
2. Nowadays they'll print special markings in fluorescent ink on bank notes to do what?
- To detect whether it is genuine or fake. Under UV light, genuine notes will display the special fluroescent marking. Whereas when fake notes are placed under UV light they'll glow all over, and they'll be no markings.
- To detect whether it is genuine or fake. Under UV light, genuine notes will glow all over, and they'll be no markings. Whereas when fake notes are placed under UV light they will display the special fluroescent marking
3. Why are fluroescent lamps safe to use?
- Because all of the UV radiation is absorbed by a phosphor coating on the inside of the glass.
- Because it's used in a classroom and the teachers deem it as okay to use.
- Because all of the UV radiation is absorbed by the heat coating on the outside in the atmosphere.
4. How does photography work.
- Cameras use a lens to focus infrared light onto a light-sensistive film or electronic sensor that records the image.
- Cameras use a lens to focus visible light onto a light-sensistive film or electronic sensor that records the image.
- Cameras use a lens to focus ultraviolet light onto a light-sensistive film or electronic sensor that records the image.
5. What do we need visible light for?
- To see.
- To detect forged bank notes.
- To look inside objects.
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