Frequency (m or n): The no of waves passing through a point in 1 second, unit-sec -1 or Hz. it was reallt helpfull, these notes has helped me a lot in understanding the so called hard concepts of photoelectric effect….. Share. Required fields are marked *, 1)The energy is emitted from any source continuously in the form of radiations and is called the, When these electromagnetic radiations are arranged in order of their increasing wavelength or decreasing frequencies, the complete spectrum obtained is called, If the substance being heated is a black body (which is a perfect absorber and perfect radiator of energy ie. Limitations of electromagnetic wave theory. There are also symmetric and asymmetric vibrational modes. Discovery of Electron and Thomson’s Model of an Atom. The minimum energy required to eject the electrons is called work function( Wo). It’s very helpful because it is written on the basis of NCERT and is written in a very easy language. 2)The radiations consist of electric and magnetic fields oscillating perpendicular to each other and both perpendicular to the direction of propagation of the radiation. In contrast, an automobile speeding at 100 kilometers per hour (60 miles per hour) would require 177 years to make the same one-way trip. If the frequency is less than νo , no electrons are ejected(hνo). If any substance with high melting point is heated, it first becomes red, then yellow and finally begins to glow with white and then blue light. This chapter contains new simulation results concerning the physical foundations of how microwave tubes operate based on Cherenkov’s mechanism of radiation (interaction with slow electromagnetic wave) and some experimental results connected with improving the output characteristics of the magnetrons (a mm band surface wave magnetron and a magnetron with two … Electromagnetic radiation can be defined as a form of energy that is produced by the movement of electrically charged particles traveling through a matter or vacuum or by oscillating magnetic and electric disturbance. Refraction of Electromagnetic Waves. She has started this educational website with the mindset of spreading Free Education to everyone. wavelengths (or more precisely relatively narrow bands in the NIR region.). Thanks for this…. whenever radiation interacts with matter, it displays particle like properties. Relation between velocity ,wavelength and frequency of a wave. Some of the most prominent characteristics of photon include the following – Photons are theoretically the smallest quantum of electromagnetic energy or radiation. it is the best notes for studying board This test is Rated positive by 88% students preparing for Class 11.This MCQ test is related to Class 11 syllabus, prepared by Class 11 teachers. Properties of electromagnetic radiations: Oscillating electric and magnetic field are produced by oscillating charged particles. I wanted a print of your matter so that I could study it anywhere easily, Very easily understandable and also informative hats off to this website this is the first time I am using this and I had liked it.this information is not there in any of the website except this tq for this information. Wavenumber is defined as the number of waves present in 1 cm length. Every topic is easy to understand but the problem is I am not able to copy it on my computer. It is represented by λ (Lambda) and is expressed in A° or m or cm or nm or pm. 12-1: Electromagnetic spectrum. Fig. The electrical characteristics of the electromagnetic field are presented as the characteristic impedance of … To get fastest exam alerts and government job alerts in India, join our Telegram channel. These fields aretransmitted in the form of waves. Max Planck in 1900, put forward a theory known after his name as Planck’s Quantum theory. 14 lessons • 2h 14m . Greater is the frequency of the incident light, greater is the kinetic energy of emitted electron. = c); and radiation can have properties of both a wave and a particle.