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रे और वेव ऑप्टिक्स, दिशा प्रकाशन द्वारा : जेईई मेन और उन्नत परीक्षा हेतु पीडीऍफ़ बुक | Ray & Wave Optics by Disha Publication : For JEE Main and Advanced Exam PDF Book

रे और वेव ऑप्टिक्स, दिशा प्रकाशन द्वारा : जेईई मेन और उन्नत परीक्षा हेतु पीडीऍफ़ बुक | Ray & Wave Optics by Disha Publication : For JEE Main and Advanced Exam PDF Book


Name of Book :  Ray & Wave Optics / रे और वेव ऑप्टिक्स 

Hope This Ray & Wave Optics Book will Step up you to Succeed / आशा करते हैं रे और वेव ऑप्टिक्स पुस्तक आपके कदम सफलता की ओर ले जायगी

Language of Book : English

Size of Ebook : 20.8 MB

Total pages in ebook : 248

Ebook Downloading Status  : Best 
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Description about eBook : WHAT IS LIGHT?

The curiosity about the nature of light; whether it is  particle or wave has a very interesting and long history. In the last more than three hundreds of years, scientists discovered numerous facts regarding with the light. These are : rectilinear propagation of light, double refraction, diffraction, interference, polarisation and photoelectric effect etc. On the basis of these observed phenomenon, many theories about nature of light have been proposed. These are :
Corpuscular theory
Newton and many other scientists of the day supported this theory. According to this theory, the light consists of small weightless particles called corpuscles; which come out from the source at a very high speed. This theory was able to explain the rectilinear propagation and reflection, but could not explain the phenomenon of diffraction, which was discovered by Grimaldi as early as 1665.
The wave theory
Huygens proposed the wave theory of light. According to him light is a wave form, which travels from the source to the surroundings in all directions through a hypothetical medium, called ether. The experiments of Fresnel and Thomas Young on interference and diffraction showed that there are many optical phenomenon that can be understood on the basis of the wave theory but not by corpuscular theory.
Maxwell's EM-wave theory
The next great forward step in the theory of light was the Maxwell in 1873. According to him the light was considered to be electromagnetic waves composed of electric and magnetic fields oscillating mutually perpendicular and also perpendicular to the direction of propagation. The presence of ether is not needed. This theory however failed to explain the phenomenon of photoelectric effect and Compton¢s effect.
The quantum theory
This theory was proposed by Max Plank in 1900. According to this theory light was considered in the form of small packets of energy called photons. Photoelectric effect was explained by Einstein in 1905 on the basis of this theory, but this theory could not explain the phenomenon like interference, diffraction. Scientists today consider the light to have dual nature i.e., wave as well as particle. The phenomenon of light propagation may be best described by the electromagnetic wave theory, while the interaction of light with matter is a particle phenomenon.............

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