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Overview (in Hindi)
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This is overview about the lectures

Dr ranjeeta
I am a doctor ,selected in upsc cse 2013 , currently posted . love to share my knowledge in explaining concepts logically .

U
Unacademy user
Sb
ma'am, these lectures r sufficient or we have to refer books also?
Nice slide and presentation M`am.
PC
hindi m btaye plz...kyoki exam hindi m Dena h mam ..
  1. UPSC CSE 2013 SELECTED DR. RANJEETA


  2. 1 INTERIOR OF THE EARTH 1.1 Why know about earth's interior 1.2 Sources of information about the interior 1.2.1 Direct Sources 1.2.2 Indirect Sources 1.2.3 What causes the magnetic field of earth? 1.3 Some sources explained in detail 1.3.1 High Levels of Temperature and Pressure Downwards


  3. 1.3.2 Evidence From The Meteorites 2 Seismic waves 2.1 What causes earthquakes? 2.2 Earthquake Waves 2.3 Behavior of Earthquake Waves 2.3.1 Primary Waves (P waves) 2.3.2 Secondary Waves (S waves) 2.3.3 Surface Waves (L waves) 3 Propagation of Earthquake Waves 3.1 Emergence of Shadow Zone


  4. 3.2 But how these properties of 'P' and 'S' waves help in determining the earth's interior? 3.2.1 Why does sound wave travel faster in a denser medium whereas light travels slower? 3.2.2 Why S-waves cannot travel through liquids?