Working waves

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Can you name the answers to questions on working waves?

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

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