(f) Isostere Species having same number of atoms and same number of electrons, are called isostere, e.g., N2 and CO. All CBSE Notes for Class 11 Chemistry Maths Notes Physics Notes Biology Notes. To visualiz… diffraction etc., but it could not explain the following . (ii) Shell method In this, the number of electrons in each shell is continuously written. (1) Light and other forms of radiant energy propagate without any medium in the space in the form of waves are known as electromagnetic radiations . The number of spectral lines in the spectrum when the electron comes from nth level to the ground level = n(n – 1) / 2. The position of an electromagnetic wave within the electromagnetic spectrum could be characterized by either its frequency of oscillation or its wavelength. The e / m ratio of proton is 9.58 * 10-4 C / g. (e / m ratio is maximum for hydrogen gas.). To begin with, one of the most important results of Maxwell’s theory is that accelerated charges radiate electromagnetic waves. c = λv = 3 × 10 10 cm/sec. These orbits are known as stationary orbits. As a wave, it is represented by velocity, wavelength, and frequency. The mass of neutron is 1.675x 10-24 g or 1.008665 amu or u. Thus. It will show changes in wavelength. (c) Meson Discovered by Yukawa (1935) and Kemmer. CBSE Practice Papers class 12 Physics Dual Nature of Radiation and Matter. the wavelength of the wave is As a particle, EM is represented as a photon, which transports energy.Hey guys स्वागत है आपका Science शाला में जहां आपको 9th 10th 11th और 12th की physics chemistry और biology की animated videos मिलेगी जिससे आपको सारे topics clear हो jayenge अगर आपको Science study और Reaserch related रोचक रूप से पसंद है तो हमारे science शाला को subscribe कर के सदस्यता लीजिए.. और science की प्रगति में सहयोगी बनिए..‍\r\rपढ़ने वाले बच्चे Science शाला में आ जाए पढ़ाई शुरू हो चुकी है...! It tells about the number of subshells (s. p, d, f) in any main shell. diffraction etc., but it could not explain the following. 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. 11.3.2 Hallwachs’ and … Entire mass of the atom is concentrated inside the nucleus. (e) Isoelectronic Species with same number of electrons are called isoelectronic species, e.g., Na+, Mg2+. DPP-01 Dual Nature of Radiation and Matter Class 12 Notes Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Notes – PDF Download The phenomenon of emission of photo electron from the surface of metal, when a light beam of suitable frequency is incident on it, is called photoelectric effect. We're currently working to add even more videos, practice, and exam-aligned materials to this course. It is unable to explain the splitting of spectral lines in the presence of magnetic field (Zeeman effect) and electric field (Stark effect). The change in color shows, that wavelength also changes .This indicates non continuous flow of energy. Microscopic particle-like electrons also proved to possess this dual nature property. Threshold frequency (vo) = minimum frequency of the radiation, Work function (Wo) = required minimum energy of the radiation, [Kinetic energy of ejected electron = h(v – vo), where; v = frequency of incident radiation. This phenomenon is known as photoelectric effect. 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. According to Maxwell’s electromagnetic theory, charged particles when accelerated must emit electromagnetic radiations. All electromagnetic waves travel with the same velocity, i.e., 3 × 10 10 cm/sec. These travel in straight line away from cathode and produce fluorescence when strike the glass wall of discharge tube. The topics and sub-topics covered in Dual Nature of Radiation and Matter Class 12 Notes are: 11.1 Introduction. The array obtained on arranging all the electromagnetic waves in an order on the basis of their wavelength is called the electromagnetic spectrum. According to Bohr’s theory. the angular momentum of revolving electron in all elliptical orbit is an integral multiple of h / 2π, i.e., N shell. Einstein in 1905 suggested that light has dual nature, i.e. An orbital can occupy a maximum of two electrons. Particle Nature of Electromagnetic Radiation : Planck explain the distribution of intensity of the radiation from black body as a function of frequency or wavelength at different temperatures. (a) Isotopes Species with same atomic number but different mass number are called isotopes, e.g. ... MCQ Hydrogen Class 11 Inorganic Chemistry Chapter 9. According to this theory. Contents1 Matter wave or a de Broglie wave2 Verification of dual character of electrons2.1 (1) Davisson and Germer’s experiment2.2 (2) Thomson’s experiment3 Verification of Particle Character4 Derivation of Bohr’s postulate of angular momentum from de Broglie equation Matter […] An electromagnetic wave emitted by source travels 2 1 km to arrive at a receiver. Wave nature of electromagnetic radiation explains interference and diffraction but could not explain black body radiation and photoelectric effect. To assist you with that, we are here with notes. This is possible only when you have the best CBSE Class 11 Chemistry study material and a smart preparation plan. 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. 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