# MODERN PHYSICS CLASS 12

Read and also downpack cost-free pdf of CBSE Class 12 Physics Modern Physics Exam Notes. Students and teachers of Class 12 Physics deserve to acquire cost-free progressed research material, revision notes, sure swarm questions and answers for Class 12 Physics prepared as per the latest syllabus and examicountry guidelines in your institution. Standard 12 students have to downpack this research product which will offer them even more expertise for all chapters in Physics and all crucial topics which are scoring and also deserve to obtain you even more marks. Students should also downfill cost-free pdf of Chapter wise Notes for Class 12 Physics all set by college teachers as per the latest NCERT, CBSE, KVS books and also syllabus issued this year and also likewise downpack free worksheets and question files obtainable below to gain greater scores in school exams and tests, also click here for more Study Material for Class 12 Physics

CBSE Class 12 Physics Modern Physics Exam Notes. Please refer to the examination notes which you have the right to use for preparing and also revising for exams. These notes will certainly assist you to revise the concepts quickly and also get excellent marks.

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Bohr’s Model for atom Bohr’s theory is a mix of timeless and quantum method. It clears the draw backs of Rutherford’s model according to which electron must loose power while revolving about nucleus and also lastly need to fall into nucleus. When electron goes from orlittle bit to another it can orlittle bit or radiate electromagnetic radiation. Postulates (i) electron moves in circular course about nucleus under the influence of electrostatic attractivity between electron and nucleus. (ii) electron have the right to relocate just in schosen orbits in which electron can have angular momentum integer multiply of .h/2π i.e., mvr = nh/2π wbelow h is plank’s consistent and also n is shell no.

Interpretation of hydrogen spectrum

The electron in the hydrogen atom resides in the initially orlittle. When power is offered, the electron moves to higher power shells depending upon the amount of energy absorbed. When this electron retransforms to any of the lower power level, it emits power. Lyman series is acquired when the electron retransforms to the lowest energy state while Balmer series is obtained once the electron retransforms to second energy shell. Similarly, Pashcen, Brackett and also Pfund series are obtained when electron retransforms to the third, fourth and fifth energy shell from higher power shells respectively.

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