Physics is defined as one of the branches of Science that explains the physical properties of matter, energy, and how they work together. There are numerous terms in Physics that we use in explanation of concepts, laws, and principles.
In this article we will learn about all such laws and terms of Physics that start from letter B. The list consists of most of the terms and their definitions along with examples and applications wherever required.
According to Brewster’s law, when an unpolarized light with a known wavelength is incident on a transparent surface of a material, there is an experience of maximum plan polarization at the angle of incidence whose tangent is the refractive index of the material for the wavelength. The other way of explaining Brewster’s law is that it is a relationship between the light waves at the maximum polarization angle.
The law is named after the Scottish physicist, Sir David Brewster who proposed this law in 1811. He was successful in determining that the refractive index of the medium and the tangent angle of polarization are equal to each other. The polarization angle is also known as Brewster’s angle. This is given as the Brewster’s law:
|μ = tan i|
Where μ is the refractive index of the medium and i is the polarization angle.
According to Babinet’s principle states that the diffraction pattern from an opaque body is similar to that from a hole of the same size and shape. This doesn’t hold good for a beam intensity which is in the forward direction. The principle was formulated by the French physicist Jacques Babinet.
Application of Babinet’s Principle
The principle finds application in optics. It is also used for determining the equivalence in shape and size.
According to Bernoulli’s principle, the total mechanical energy of the fluid that is moving consists of the kinetic energy of the fluid motion, the energy associated with the pressure in the fluid, and the gravitational potential energy of elevation remains constant.
Applications of Bernoulli’s Principle
- The rate of flow of liquid through the pipes is measured using a device known as venturi meter.
- Working of an aeroplane is based on Bernoulli’s principle. The shape of the wings is designed such that the air passes through the upper surface rather than the lower surface at higher speeds.
According to Bragg’s law, the angle of coherent and incoherent scattering from a crystal lattice. There are many applications of Bragg’s law and two of them are mentioned below:
- The analysis of crystals in the spectrometer in X-ray fluorescence spectroscopy and Wavelength dispersive spectroscopy, d-spacing crystals are used.
- The d-spacing crystal is also used for the identification and characterization purposes in X-ray diffraction.
The hydrogen atom has its spectral emission lines known as Balmer series. This series of spectral emission takes place when the electrons from higher levels transit to energy level with principal quantum number 2. These transitions are visible in the optical waveband and is empirically given by the Balmer formula which is as follows:
Following are the four transitions in the Balmer series that are represented by using the Greek characters, and they are as follows:
|Δn = (n2 – n1)||Transition||Name||λ in Å|
Thus, these were the 5 Physics terms that start from the letter B. These terms are used in the field of Physics to explain different concepts. To learn more such Physics vocabulary, stay tuned to BYJU’S and subscribe to our YouTube channel for more understanding of concepts with visual information.