Electromagnetic Spectrum | Electromagnetic Wave Spectrum | apniPhysics
The electromagnetic spectrum has its origins in the study of electromagnetism and the behavior of electromagnetic waves. It emerged as a result of the work of several physicists and scientists over the 19th and 20th centuries who sought to understand ...
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Magnetic Moment of an Electron Revolving around Nucleus and Formula
The magnetic moment of an electron is a measure of the orbital angular momentum or spin of an electron and its magnetic field. It is expressed in terms of the Bohr magneton, which consists charge of the electron, the Plank’s ...
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Graduate Physics Video Tutorials
Physics video tutorials for BSc and BE/BTech students
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Interference by Reflected and Transmitted light using Thin Film
Interference of light by reflected and transmitted light rays from a thin transparent film. We will observe in this topic. How it happens and what are the requirements?. What are the condition for the thin film? Light that we are ...
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Properties of optical fibers
The refractive index in the core material of the fiber varies due to variation in the composition of the core material which give rise to two types of optical fibers. These are; Step Index fiber Graded Index fiber Further, on ...
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What is Total Internal Reflection (TIR)?
Total Internal Reflection Total Internal Reflection (TIR) is the principle of signal transmissions in optical fibers. The understanding of the critical angle is important to understand the TIR. Do you know at what time the incident angle is called the critical ...
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Magnetic Units and Conversion Factors
In this table, basic physical quantities that are used in magnetic materials are included. The symbol and conversion from one magnetic unit to the other. This conversion will be helpful in numerical problems. Quantity Symbol SI Unit CGS emu Unit ...
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Specifications of Different Optical Fibers
Single-mode step-index fiber: Core diameter: 7 to 11 μm Cladding diameter: generally 125 μm Coating diameter: 200 to 300 μm Numerical aperture: 0.08 to 0.15 Performance: 2 to 5 dB/km with a scattering limit of around 1 dB/km at a wavelength of ...
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Signal Attenuation in an Optical Fiber
Signal attenuation within the optical fibers is usually expressed in the logarithmic unit of the decibel. Decibel is defined by the input and output power ratio of the signal for a specific operating wavelength. The overall signal attenuation is defined ...
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