According to huygens theory the speed of light in denser medium is less than the speed of light in rarer medium. Download maharashtra hsc books for science, maths, physics, chemistry, agriculture etc. Light is a spreading wave in the electromagnetic medium of space. Emr radiation is classified by either frequency or wavelength which are inversely related to each other through the constant, c, which is the speed of light. Augustinjean fresnel 17881827 disproved newtons corpuscular theory. The two most successful theories of light were the corpuscular or particle theory of. Mhcet mhtcet engineering chapterwise notes and other. The envelop of all these secondary waves, at any later instant, gives the new wave front at that instant. Hsc physics wave theory of light light luminiferous aether.
Give a brief account of huygens wave theory of light. He argued in nova theoria lucis et colorum 1746 that diffraction could more easily be explained by a wave theory. Vertical circular motion for bubble, always double the area while using any formulae above. Other articles where wave theory of light is discussed. Youngs double slit experiment shows clearly that light is a wave.
Maxwells em theory relationship between magnetism and electricity equivalence among velocities of em waves and light no necessity of the medium for propagation 5 max plancks quantum theory black body radiation propagation of light in form of quanta quanta a. Maharashtra 12th board syllabus 202021 is available in pdf format on mahahsscboard. Maharashtra hsc syllabus 202021 science, commerce, arts. Hsc physics wave theory of light free download as powerpoint presentation. Class 12 maharashtra board physics chapter weightage. In the seventeenth century two rival theories of the nature of light were proposed, the wave theory and the corpuscular theory. Huygens put forward his wave theory according to which light energy propagated in the form of wave, with the help of wave theory he could successfully explain the phenomenon of reflection and refraction, interference and diffraction all. In a sense wave mechanics is one step removed from this deeper theory in that the latter highlights the informational interpretation of quantum mechanics. Maharashtra state board hsc physics syllabus cbse board. According to wave theory of light, the light is a form of energy which travels through a medium in the form of transverse wave motion. This theory is called huygens wave theory of light.
Every point on a wave front acts as a secondary source of light, sending out secondary waves. Maharashtra state board hsc textbooks, msbshse 10th new. This is illustrated by the wave model of light and the particle model of light, which together describe the wave particle duality in which light is understood to possess both wave and particle functions. The refractive indices of water for red and violet colours are 1. Interference is described using real and complex numbers in anticipation of quantum mechanics.
If light were a wave than electrons will take some time to come out fro. Contemporary view r distance from source s to point o on wavefront at aperture. Lets understand how the light behaves as a particle and as a wave. If the nature of the wave front at any instant is known, we can determine the nature and the position of the wave front at any later instant by huygens construction, based on huygens principle. Mhhscphywave theory of lightpart 1 powerpoint slides. James clerk maxwell showed that light is an electromagnetic wave that travels at the speed of light through space. There is an underlying, more general theory of which wave mechanics is but one mathematical manifestation or representation. Wave theory definition of wave theory by merriamwebster. Learn question and answer of physics of maharashtra hsc board from your mobiledesktop for free.
In 1678, dutch physicist christian huygens proposed a theory to explain the wave nature of light. Direction from points o to points p is not constant, so amplitude of wavelets originat. Sir issac newton was a strong advocate of the particle nature of light. The treatment is kept at a level that should be accessible to first year undergraduate students and does not require more than elementary calculus, probability and statistics. This helps them to score good marks in their hsc exam. The speed of light in a medium depends upon the nature of medium. Hello students, this video is for quick revision of physics chapter wave theory of light includes theory revision, formula revision, mhtcet applicationoriented questions. Clickers to enlarge or for better viewing visit desktop site. There is no time lag bw incident of radiation and ejection of electrons. Wave theory of light lecture 1, hsc std 12, maharashtra board. Echolocation waves can have frequencies of about 100,000 hz.
Its dual behavior is partly explained by 1doubleslit experiment of thomas young who represents the photons motion as a wave and also by 2the photoelectric effect in which the photon is considered as a particle. The dutch astronomer huygens 16291695 proposed a wave theory of light. According to newton light energy propagates from one point to another in the form of particle. When these waves carrying energy reach the eye, they excite the optic nerves and the sensation of vision is produced. Light is a transverse, electromagnetic wave that can be seen by a typical human. Light light as electromagnetic radiation britannica. Maharashtra board ssc examination 2015 question papers pdf. Physics ii question and answer hsc board of maharashtra. Why doesnt wave theory explain the photoelectric effect.
But, the dutch physicist, christiaan huygens believed that light was made up of waves. Photoelectric can be only explained by assuming that light is made up of particle not wave because 1. Quantum theory of light waveparticle duality of light. The wave theory and the particle theory of light were long considered to be at odds with. The understanding of maharashtra state board 12th physics syllabus is a must, so that the students can make a preparation plan to clear the class 12 board exam with good grades. Circular motion relation between linear and angular velocity, radial acceleration geometrical and calculus method, relation between linear and angular acceleration, banking of roads, conical pendulum, vertical circular motion tension velocity energy, tension, velocity, energy gravitation acceleration due to gravity, critical velocity, time period, binding energy of satellite, escape. Linear wave theory is the core theory of ocean surface waves used in ocean and coastal engineering and naval architecture. V2 light does in materials with varying index of refraction. Phys 201 lecture 18 wave theory of light open yale. These theories are logically and physically incompatible.
The 12th physics chapter weightage hsc helps the students to know on which topic to concentrate more. In spite of theoretical and experimental advances in the first half of the 19th century that established the wave properties of light, the nature of light was not yet revealedthe identity of the wave oscillations remained a mystery. Wave theory of light history, huygens propostions and more. Maharashtra 12th syllabus 2020 2021 msbshse hsc exam. He believed that light was a longitudinal wave, and that this wave was propagated through a material called the aether. Scribd is the worlds largest social reading and publishing site. Light and its nature have caused a lot of ink to flow during these last decades. In order to observe the wave behavior of light, the slit size and separation should be comparable or smaller than the wavelength of light. Now if the electron wave is to give constructive interference in a circular orbit. The phenomena like reflection, refraction, polarization, simultaneous reflection and refraction, total internal reflection, diffraction etc can be successfully explained with this theory. This conclusion is in perfect agreement with the experimental findings. This situation dramatically changed in the 1860s when the scottish physicist james clerk maxwell, in a.
Another supporter of the wave theory was leonhard euler. A qedbased wave theory of light, electrons, and their. Calculate the wavelength of light from traffic signals in nm. Maharashtra hsc question papers 2020, 2019 download. According to wave theory of light, a source of light sends out disturbance in all directions. Newtons corpuscular theory light consists of very small invisible elastic particles which travel in vacuum with a speed of 3 x 108 ms. Std 12 hsc syllabus have two topics on wave optics. Know here hsc level physics subject syllabus, pattern and marks allotment. The reasoning here is that there probably arent too many things in the world that travel with the speed of light. To explain the propagation of light waves through vacuum, huygens suggested the existence of a hypothetical medium called luminiferous ether. Ray theory is a highfrequency approximation this statement is the same as saying that the medium apart from sharp.
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