Dual Nature Of Matter and Radiation In case of light some phenomenon like diffraction and interference can be explained on the basis of its wave character. To visualiz… Electromagnetic spectra may be emission or absorption spectrum on the basis of energy absorbed or emitted. The spectrum of electromagnetic radiation has no upper or lower limits and all the regions overlap. It carries a unit negative charge (-1.6 * 10-19 C). (v) Amplitude (a) It is the height of the crest or depth of the trough of a wave. The magnetic and the electric fields come at 90° to each other and the combined waves move perpendicular to both electric and magnetic oscillating fields occurring the disturbance. And the corresponding wave related to that matter is called matter wave John Dalton proposed (in 1808) that atom is the smallest indivisible particle of matter. Hence. CBSE Class 11 Chemistry Atomic Structure– Get here the Notes for CBSE Class 11 Chemistry Atomic Structure. The orbital angular momentum of an, Value of l = 0 to n – 1. He performed the experiment in a discharge tube which is a cylindrical hard glass tube about 60 cm in length. Vectors; Class-XI. DPP-01 Soon you should be able to learn, practice, and master the skills on Khan Academy that are required for your 11th board exams. the angular momentum of revolving electron in all elliptical orbit is an integral multiple of h / 2π, i.e., N shell. I = 0 for s, I = 2 for d It also is a spectrum consisting of radio waves, microwaves, infrared waves, visible light, ultraviolet radiation, X-rays, and gamma rays. We will learn the dual nature of light and electron, quantum mechanics, quantum numbers. Complete Wave Nature of Electromagnetic Radiation Class 11 Video | EduRev chapter (including extra questions, long questions, short questions) can be found on EduRev, you can check out Class 11 lecture & lessons summary in the same course for Class 11 Syllabus. Reasoning that radiation and matter should be symmetrical in nature, Louis Victor de Broglie attributed a wave-like character to matter (material particles). ( Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter ) www.free-education.in is a platform where you can get pdf notes from 6th to 12th class notes, General Knowledge post, Engineering post, Career Guidelines , English Speaking Trick , How to crack interview and lots more. As a wave, it is represented by velocity, wavelength, and frequency. , 1H1, 1H2. Electrons revolve around the nucleus in circular orbits. Electromagnetic radiation, as you may recall from a previous chemistry or physics class, is composed of electrical and magnetic waves which oscillate on perpendicular planes. A spark is produced between S 1 and S 2 and electromagnetic waves of high frequency are radiated. Radio waves, microwaves, infrared light, visible light, ultraviolet light, X-rays and gamma rays are all electromagnetic radiations. If distributive inference occurs at the receiving end. In this second unit of class 11 chemistry, we will learn the discovery of subatomic particles- electrons, neutrons, & protons, atomic models of J.J Thomson's, Rutherford's, Bohr's. These phenomena could be explained only if electromagnetic waves are supposed to have particle nature. Electromagnetic Radiation is basically light, which is present in a rainbow or a double rainbow. Thus, an electron moving around nucleus in an orbit is under acceleration. These waves can travel through a vacuum at a constant speed of 2.998 × × 10 8 m/s, the speed of light (denoted by c). It is denoted by the Greek letter λ (lambda). (a) Isotopes Species with same atomic number but different mass number are called isotopes, e.g. Electromagnetic (EM) radiation is a source of energy which is propagated in the form of electromagnetic waves through free space or through a material medium. Find Out The Wavelength Of The Radiation. Corresponding to the wavelength of each photon of light emitted, a bright line appears in the spectrum. 1. If the substance being heated is a black body. Hertz was able to produce electromagnetic waves of frequency about 5 × 10 7 Hz. According to the electromagnetic theory, the energy is emitted or absorbed continuously. where, h = Planck’s constant = 6.63 x 10-34 j-s, If n is the number of quanta of a particular frequency and ET be total energy then Et = nhv. 2. Electromagnetic (EM) radiation is a form of energy with both wave -like and particle-like properties; visible light being a well-known example. These waves can travel through medium as well as through vacuum. Photoelectric effect. It was named by Stony. Number of waves in an orbit = circumstances of orbit / wavelength. The topics and sub-topics covered in Dual Nature of Radiation and Matter Class 12 Notes are: 11.1 Introduction. Neils Bohr proposed his model in 1931. The passage of X-rays through materials, including biological tissue, can be recorded. Neither 1 nor 2. Mass of electron is 9.11 * 10-31 kg and mass of one mole of electron is 0.55 mg. Electromagnetic wave theory was successful in explaining the properties of light such as interference. Class 11 Chemistry Structure of Atom: Electromagnetic theory: Electromagnetic theory: According to this theory . These cause mechanical motion in a small pin wheel placed – their path. All electrons of nd and nf orbital contribute σ = 0.35 and those of (n – 1)and f or lower orbital contribute σ = 1.00 each. Much of modern technology is based on electromagnetic radiation. Chapter 15 Class 11 Waves Progressive Harmonic Transverse Travelling-Wave Inference-Wave Standing-Waves Modes Vibration JEE Mains/NEET PDF Notes According to Bohr’s theory. The magnitude of σ is determined by Slater’s rules. (iii) Velocity : It is defined as the distance covered in one second by the wave. 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