UV Light
This lesson covers:
- The main uses of visible light
- The main uses of ultraviolet light
Visible light is the spectrum of wavelengths that our eyes ________ detect.
can
cannot
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Which type of electromagnetic waves have longer wavelengths?
Ultraviolet light
Visible light
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The acronym ROYGBIV can be used to remember the order of wavelengths in visible light, from longest to shortest wavelength.
Using the acronym, list those wavelengths in order below.
Red
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Which of the following is used to transmit data really quickly over very large distances (halfway around the earth)?
Optical fibres
Short wave radio
Planes
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While bouncing off the walls of optical fibres, all light rays must be totally reflected (rather than absorbed) at the same angle, so that the signal quality isn't reduced.
Therefore, the reflection must be which type of reflection?
Diffuse reflection
Specular reflection
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Ultraviolet light can be used to:
(Select all that apply)
Destroy microorganisms in water sterilisation
Check for 'invisible markings' on passports
Give sun tans
Cook food
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Fluorescence is:
The science of flowers
The science of flower scents
Emitting ultraviolet light
Ultraviolet light energy being absorbed and re-emitted as visible light
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