^Optical frequencies
^Optical frequencies Using the relation c = f λ, with c = 3 x 108 m /s & λ = 380 nm to 780 nm we can check that the optical frequencies are of the order of 1015 Hz.
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^What is visible light
^What is visible light EM-radiation that can be detected by the human eye is called white light or simply visible light. It is mainly through visible light and the sense of vision that we know and interpret the world around us. Sensation of colour of light perceived by the human eye is determined by its […]
^Quantum optics
^Quantum optics Quantum optics treats light as a particle (localised energy packet) called photon’ to deal with photoelectric effect, Raman effect & LASER, etc.
^Wave optics
^Wave optics Light behaves as a wave when the size of obstacle is comparable with the wavelength of light. Wave optics branch explains the following phenomena Interference (i.e. non uniform distribution of energy when two or more light waves superpose) Diffraction (i.e. bending & spreading of light wavefronts on encountering obstructions of size comparable or […]
^Physical optics
^Physical optics Physical optics is further divided into two parts, viz., wave optics and quantum optics.
^Geometrical optics
^Geometrical optics Geometrical optics is also called ray optics. It treats propagation of light in terms of rays and is valid only if wavelength of light is much lesser than the size of obstacles. It deals with the following phenomena rectilinear propagation (i.e. light propagates in a straight line, due to its small wavelength) reflection […]
^What is optics?
^What is optics? The branch of Physics which deals with light, it’s nature, cause, source, properties & it’s effects is called Optics.
^What is light?
^What is light? In general light means following three parts Infra red radiation or thermal radiations visible light ultraviolet light, As these are parts of EM spectrum, thus light is electromagnetic, thus properties of light are same as that of any EM wave. Light can behave like a ray, a wave & as a particle, […]
^Electromagnetic Force
^Electromagnetic Force EM – force acts between charged particles. It binds electrons with nuclei to form atoms & binds atoms together to form molecules. It is responsible for the properties of solids, liquids, & gases. Force of attraction/repulsion between two static charges is described by the Coulomb’s law i.e Electric forces and magnetic forces were […]
^Maxwell equations
^Maxwell equations Following five equations give a complete description of all em– interactions and are called Maxwell eq:
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