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Direct linkRuddock, Ivan S. – European Journal of Physics, 2009
The derivation and description of the modes in optical waveguides and fibres are reviewed. The version frequently found in undergraduate textbooks is shown to be incorrect and misleading due to the assumption of an axial ray of light corresponding to the lowest order mode. It is pointed out that even the lowest order must still be represented in…
Descriptors: Textbooks, Textbook Evaluation, Physics, Science Instruction
