Earths Interior

The interior of the earth is composed of three layers.

1. Crust which is divided into upper and lower by the Conard Discontinuity.
2. Mantle which is divided into upper and lower by the Reptite Discontinuity.
3. Core which is divided into  upper and lower by the Transition or Lehman Discontinuity.
4. Crust and mantle is separated by the Moho discontinuit.
5. Mantle and core is separated by the Gutenberg discontinuity.

Factors that contributed to the unity of India

This is part of the series in Modern Indian History that is added to GS I in the new syllabus.

India as a young nation after Independence had to strive for the Unity of India. The global Intellegentsia was skeptical of the survival of India as the divisive forces and the factors that contribute to fragmentation were largeand they outnumbered the reasons and factors of India's unity and existence. Yet India has withstood the test of time against all odds and is considered by  historians and researchers of democracy as an exception as India was reeling under poverty, communal-ism, caste-ism, underdevelopment, linguistic and regional exclusiveness, Inequality etc. We will be considering the factors that unite India in this article.

Sci & Tech : Mobile Technology Generations

Telecommunications have grown leaps and bounds from telephones to portable radio phones to cellular phones( first generation to fifth Generation). The below document gives an overview about all the generations.

Generations of mobile wireless technology pdf download

SCi & Tech : Electromagnetic Spectrum

The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays.

Preparing for the Civil Service Exam : Book by IAS toppers

Preparing for the Civil Service Exam : Book by IAS toppers

Prelims are over and its time for Mains. Preparation tips and strategy for Civil services by the toppers themselves.

Reading between the lines by IAS toppers