Working waves

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Can you name the answers to questions on working waves?

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Question
A remote control uses _________ radiation
Convert 20 ns into seconds
What are optical fibres made from?
Which type of optical fibre is used in long distance data transmissions?
What is the approximate range of wavelengths for visible light
Which type of optical fibre is used in short distance data?
What is frequency measured in?
Which type of optical fibre has a gradual chnage in refractive index?
Give an example of a longitudinal wave
Question
What is core diameter of step index fibre?
What is the speed of light in m/s?
Radiowaves have a _________ wavelength
What is core diameter of monomode fibre?
What is the electromagnetic wave with the lowest frequency?
What type of waves are electromagnetic waves?
Gamma waves have a ________ frequency
Which type of optical fibre has a sudden change in the refractive index?
All objects emit

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