Brigade of Gurkhas Brigade of Gurkhas Brigade of Gurkhas is the collective name which refers to all the units in the British Army that are composed of Nepalese Gurkha soldiers. The brigade, which is 3,640 strong, draws its heritage from Gurkha units that originally served in the British Indian Army prior to Indian independence, and prior to that served for the East India Company. The brigade includes infantry, engineering, signal, logistic and training and support units. They are known for their kukris, a distinctive heavy knife with a curved blade, and have a reputation for being fierce and brave soldiers. The brigade celebrated
Knife-edge effect Knife-edge effect In electromagnetic wave propagation, the knife-edge effect or edge diffraction is a redirection by diffraction of a portion of the incident radiation that strikes a well-defined obstacle such as a mountain range or the edge of a building. The knife-edge effect is explained by Huygens–Fresnel principle, which states that a well-defined obstruction to an electromagnetic wave acts as a secondary source, and creates a new wavefront. This new wavefront propagates into the geometric shadow area of the obstacle. The knife-edge effect is an outgrowth of the half-plane problem, originally solved by Arnold Sommerfeld using a plane wave spectrum