Class Notes Archives - Apni Physics

Graduate Physics Video Tutorials

Post author:Dr Sushil Kumar
Post published:11/09/2022
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Post last modified:11/09/2022
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Physics video tutorials for BSc and BE/BTech students

Interference by Reflected and Transmitted light using Thin Film

Post author:Dr Sushil Kumar
Post published:08/04/2020
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Post last modified:08/04/2020
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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…

Properties of optical fibers

Post author:Dr Sushil Kumar
Post published:14/02/2019
Post category:Class Notes
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Post last modified:24/11/2019
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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.…

What is Total Internal Reflection (TIR)?

Post author:Dr Sushil Kumar
Post published:14/02/2019
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Post last modified:24/11/2019
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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…

Magnetic Units and Conversion Factors

Post author:Dr Sushil Kumar
Post published:12/10/2018
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Post last modified:24/11/2019
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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…

Specifications of Different Optical Fibers

Post author:Dr Sushil Kumar
Post published:28/09/2018
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Post last modified:24/11/2019
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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…

Signal Attenuation in an Optical Fiber

Post author:Dr Sushil Kumar
Post published:28/09/2018
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Post last modified:24/11/2019
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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…

Total Internal Reflection- Optical Fiber

Post author:Dr Sushil Kumar
Post published:26/09/2018
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Post last modified:24/11/2019
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Ray Theory Transmission Let's see what happens when a light ray encounters a boundary separating two different media? In the figure given below, n1 and n2 are the refractive indices…

Basic Introduction of Optical Fiber- Refractive Index

Post author:Dr Sushil Kumar
Post published:24/09/2018
Post category:Class Notes
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Post last modified:24/11/2019
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Some of the questions that arise about the optical fibers (OF) are: What is the structure of an optical fiber? How does light propagate along a fiber? What materials are…

Resistors in Series |Ohms Law

Post author:Dr Sushil Kumar
Post published:13/05/2018
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Post last modified:24/11/2019
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Resistors in Circuits There are three things, in Ohm's Law Resistance Voltage Current In this equation if I increases then R will decrease. It means the result of product remain…