What is an optical fibre - Study guides, Class notes & Summaries

Refraction, Optic Fibres, Waves Review Questions with complete Solutions Graded A+ State and explain why the core of an optical fibre is made as narrow as possible. - Answers To reduce multipath dispersion To prevent data loss from the core which would cause attenuation. State one application of optical fibres and explain how this has benefited society. - Answers Endoscope - improved medical diagnosis Communications -improved transmission of data/high speed internet. what are the 3 parts of...

Test Bank Solution Manual for Optical Fibres & Refraction + Waves and Diffraction Explain how the glass cladding around the optical fibre's core improves the security of data being transmitted through it give a reason why this is important. - Answers *light does not enter the cladding so cannot pass across from one fibre to a neighbouring fibre* (1) fibres without cladding can allow light to pass between fibres when the surface of the fibre becomes scratched (1) personal data (...

Polarisation, refraction, and optical fibres Exam Questions and Answers Latest Update already Passed What type of waves can be polarised? - Answers Only transverse waves When light passes through a polarising filter, how does its intensity change? - Answers It halves When light passes through two polarising filters, with their transmission axes perpendicular, how does its intensity change? - Answers No light gets through State 2 uses of polarisation. - Answers In polaroid sunglasses & camer...

A Wave - Correct answer-is something that transfers energy from one place to another without transferring any matter over that distance Longitudinal waves - Correct answer-A wave where the oscillations are parallel to the direction that the wave transfers energy. Examples; Sound waves, P-waves after earthquakes Transverse waves - Correct answer-A wave where oscillations are perpendicular to the direction that the wave transfers energy. E.g. all Electro magnetic waves on the EM spectrum. e...

aqa a level physics paper 1 2023 What is meant by work function (2) - CORRECT ANSWER-Minimum energy required by an electron to escape from (1) a metal surface (1) What is meant by ionisation energy? (2) - CORRECT ANSWER-Minimum energy required to remove an electron from an atom (1) from the ground state (1) Why do emitted electrons have a kinetic energy that varies up to a maximum value? (4) - CORRECT ANSWER-Energy of a photon is fixed/constant (1) Energy is required for electrons to o...

State what is meant by the term analogue signal (1 mark) A signal that can have any value State what is meant by the term digital signal (1 mark) A signal that has 2 values only which are 0 and 1. Explain 2 advantages of using digital signals instead of analogue signals to transmit television programmes. (2 marks) 1. Digital Signals can carry more info than Analogue signals. 2. Less interference so better quality is produced. Give 2 other differences between visible ligh...

State what is meant by the term analogue signal (1 mark) A signal that can have any value State what is meant by the term digital signal (1 mark) A signal that has 2 values only which are 0 and 1. Explain 2 advantages of using digital signals instead of analogue signals to transmit television programmes. (2 marks) 1. Digital Signals can carry more info than Analogue signals. 2. Less interference so better quality is produced. Give 2 other differences between visible li...

Exam Bank Solution Manual for Interference and optical fibres Already Passed define path difference - Answers difference in distance travelled by two waves define phase difference - Answers the fraction of a complete cycle between two points on a wave/ between 2 waves what is a coherent source - Answers has same frequency and wavelength with a fixed phase difference what is diffraction - Answers the spreading out of waves over a gap how does increasing the wavelength of the source change t...

Topic 2: internet and communication technologies Terms in this set (240) Network two or more devices called nodes connected by some type of communications channel Node any device connected to a network server a node designed to act as a central network, a computer that provides various resources like network security; hardware, disk and printer access communications channel the connection between source and destination nodes(transmission medium) Switch Hardware that connects Node...

AQA A level Physics Questions and Answers Acceleration The rate of change of velocity Accurate result A result that is close to the true answer Apha decay A type of decay in which an unstable nucleus of an atom emits an alpha particle Alternating current A current that changes with time in a regular cycle Ammeter A component used to measure the current flowing through a circuit Amplitude The maximum displacement of a wave Angle of incidence The a...