A standing wave also known as a stationary wave, is a wave in which its peaks or any other point on the wave do not move spatially.

This phenomenon can occur because the medium is moving in the opposite direction to the wave, or it can arise in a stationary medium as a result of interference between two waves traveling in opposite directions. The most common cause of standing waves is the phenomenon of resonance, in which standing waves occur inside a resonator due to interference between waves reflected back and forth at the resonator's resonant frequency.

Hence, standing wave occurs when a wave reflects upon itself.

The Farmers Alliance was an organized agrarian economic movement among American farmers that developed and flourished in 1875.

One of the goals of the organization was to end the adverse effects of the crop-lien system on farmers in the period following the American Civil War.

The Farmer's Alliance moved into politics in the early 1890s under the banner of the People's Party, commonly known as the "Populists."

As per the latest updates, India is :

• Largest producer of milk.

• Largest producer of millets in the world.

• Largest producer of jute.

• Largest producer of ginger.

• Largest producer of bananas.

• Largest producer of castor oil seeds.

• Largest producer of mangoes.

• Largest producer of safflower oil seeds.

• Largest producer of papayas.

• Largest producer of cottonseed (As per International Cotton Advisory Committee (ICAC) report for the month of March 2017)

• Second largest producer of tea, the first position being held by China.

• Second largest producer of sugarcane, the first position being held by Brazil.

• Second largest producer of wheat, the first position being held by China.

• Second largest producer of onions, the first position being held by China.

• Second largest producer of potatoes, the first position being held by China.

• Second largest producer of garlic, the first position being held by China.

• Second largest producer of rice, the first position being held by China.

• Second largest producer of cement., next to China.

• Second largest producer of silk, the first position being held by China.

According to 2018 January reports, Mukesh Ambani is the first richest person in India being 18th in the world, followed by Azim Premji and S.P. Hinduja in second and third places.

Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA i.e, A sugar (deoxyribose) and a phosphate.

DNA is a double-stranded molecule twisted into a helix (think of a spiral staircase). Each spiraling strand, comprised of a sugar-phosphate backbone and attached bases, is connected to a complementary strand by non-covalent hydrogen bonding between paired bases. The bases are adenine (A), thymine (T), cytosine (C) and guanine (G). A and T are connected by two hydrogen bonds. G and C are connected by three hydrogen bonds.

The primary Author of HTML is Tim Berners-Lee, a scientist and academic, with the assistance of his colleagues at CERN, an international scientific organization based in Geneva, he did this. Berners-Lee invented the World Wide Web in 1989 at CERN.