ICBM: North Korea makes fresh threats against drills; U.S. bombers fly after ICBM test

Subject: Science and Technology

Section :Space technology

Concept:

A ballistic missile follows a ballistic trajectory to deliver one or more warheads on a predetermined target.
A ballistic trajectory is the path of an object that is launched but has no active propulsion during its actual flight (these weapons are guided only during relatively brief periods of flight).
Consequently, the trajectory is fully determined by a given initial velocity, effects of gravity, air resistance, and motion of the earth (Coriolis Force).
Shorter range ballistic missiles stay within the Earth’s atmosphere.
Longer-ranged intercontinental ballistic missiles (ICBMs), are launched on a sub-orbital flight trajectory and spend most of their flight out of the atmosphere.

Types of ballistic missiles based on the range

Short-range (tactical) ballistic missile (SRBM): Range between 300 km and 1,000 km.
Medium-range (theatre) ballistic missile (MRBM): 1,000 km to 3,500 km.
Intermediate-range (Long-Range) ballistic missile (IRBM or LRBM): 3,500 km and 5,500 km.
Intercontinental ballistic missile (ICBM): 5,500 km +.
Ballistic missiles of India: Agni, K-4 (SLBM), Prahaar, Dhanush, Prithvi and Trishul.