There are thousands of Volcanoes on the Earth’s surface. But sixty-one of them are active as evidence of the permanent activities and movement beneath the Earth’s crust. Volcanoes A volcano is an opening in...
The earthquakes are rapid and successive shakes of the ground, which take place one after the other. Every day, the Earth’s crust is exposed to nearly 400 earthquakes. Actually, we do not feel them,...
Mechanical waves are the waves that propagate through a material medium (the solid, the liquid, or the gas) at a wave speed that depends on the properties of that medium. The mechanical waves need...
Electromagnetic waves are formed when an electric field couples with a magnetic field. The magnetic and electric fields of electromagnetic waves are perpendicular to each other and to the direction of the wave. Mechanical...
