Planck's Constant

The Planck constant (denoted h, also called Planck's constant) is a physical constant reflecting the sizes of energy quanta in quantum mechanics. It is named after Max Planck, one of the founders of quantum theory, who discovered it in 1900. Classical statistical mechanics requires the existence of h (but does not define its value).

The Planck constant was first described as the proportionality constant between the energy (E) of a photon and the frequency (ν) of its associated electromagnetic wave. This relation between the energy and frequency is called the Planck relation or the Planck–Einstein equation:

Since the frequency Failed to parse (Missing texvc executable; please see math/README to configure.): \nu , wavelength λ, and speed of light c are related by λν = c, the Planck relation can also be expressed as

In 1923, Louis de Broglie generalized this relation by postulating that the Planck constant represents the proportionality between the momentum and the quantum wavelength of not just the photon, but any particle. This was confirmed by experiments soon afterwards.

Islamic State Turns Mosul University Chemistry Lab into Bomb Factory

Edit Breitbart 04 Apr 2016

Officials have discovered that Islamic State (ISIS/ISIL) jihadis have been using a chemistry laboratory at Mosul University to make bombs used by ISIS jihadists throughout the region ... ....

photo: Creative Commons / Gage Skidmore

Governor Scott Walker of Wisconsin speaking at the 2013 Conservative Political Action Conference (CPAC) in National Harbor, Maryland.

Up to 300,000 Wisconsin Voters Could Be Barred from Polls Thanks to Scott Walker

Edit Democracy Now 04 Apr 2016

On Tuesday, voters head to the polls in Wisconsin for both the Democratic and Republican primaries as one of the country’s toughest voting restrictions takes effect ... We speak with Ari Berman, author of "Give Us the Ballot ... ....

photo: AP / Khalid Mohammed

Suspected members of the Islamic State group wait to be taken for interrogation after being found among civilians returning to Ramadi for the first time since the city was taken back by Iraqi government forces earlier this year, in Ramadi, Iraq, Sunday, April 3, 2016.

Behind Isis lines: 'You are not prisoners. Prisoners don't get to choose what they want for breakfast'

Edit The Guardian 04 Apr 2016

The German writer Jürgen Todenhöfer was the first western journalist allowed to enter Isis-controlled Syria and Iraq – and to return safely. In an extract from his book, he describes what he saw in Raqqa and Mosul, and the chilling moment he realised that his angry, masked driver was one of the world’s most-wanted men. Sunday 7 December 2014 ... He murmurs a greeting in English in a strikingly rhythmic accent ... Twitter ... Poor ones pay less ... ....

photo: Creative Commons / Mifter

Police Pull Mississippi Man From Car, Taser Him, Pepper Spray Him, For Playing Loud Music

Edit WorldNews.com 04 Apr 2016

The Mississippi County chapter of the NAACP is seeking an investigation after police officers pulled a black man from his car, Tasered and pepper sprayed him and arrested him for playing music too loud, local television station WREG reported ... As he explains to the officers that his brakes don’t work, they begin pulling him from the car without allowing him to unbuckle his seat belt ... He then screams as another officer pepper sprays him....

photo: NATO

NATO Secretary General Jens Stoltenberg at a foreign ministers meeting at NATO headquarters in Brussels, 2 December, 2014.

Why NATO Is a Necessity

Edit Time Magazine 04 Apr 2016

After four years as the Supreme Allied Commander at NATO, I can understand some of the frustrations that are being bandied about. The European allies don’t pay enough, the organization is a relic of the Cold War, NATO has lost its mission and is obsolete. While Donald Trump is leading the band, there are certainly plenty of other detractors, and all of the criticisms have a grain of truth to them ... is far closer ... And yes, Mr ... ....

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Keel laying held in Rhode Island for stealthy Navy submarine

Edit Seattle Post-Intelligence 05 Apr 2016

"With the undersea environment constantly changing and becoming more crowded with capable threats, the Navy has decided to use South Dakota as a prototype ship that will include significant investments in stealth beyond anything seen to date," Jabaley said ... Dempsey, the wife of former Joint Chiefs of Staff chairman and retired U.S. Army Gen ... ....

Duromax 3,850W Dual-Fuel Portable Generator for $324.99 + free shipping

Edit CNET 05 Apr 2016

Factory Authorized Outlet via eBay offers the Duromax 3,850-watt Dual-Fuel Portable Generator, model no. XP4850EH, for $324.99 with free shipping. That's $5 under our mention from February and the lowest total price we could find now by $203. This generator is able to run on propane or gasoline and provides a constant 3,850 watts of power ... ....

Wang Yi Meets with Minister of State for Foreign Affairs Syed Tariq Fatemi of Pakistan (Ministry of Foreign Affairs of the People's Republic of China)

Edit Public Technologies 05 Apr 2016

Wang Yi said that the China-Pakistan all-weather strategic cooperative partnership has been constantly deepening ... the construction of the Pakistan-China economic corridor, and promote bilateral cooperation in areas such as ports, railways, highways and energy for constant progress, so as to benefit both peoples and promote regional development....

Primary school pupils 'driven to self-harm amid tests and social media stress'

Edit Belfast Telegraph 05 Apr 2016

"ATL wants all schools to have access to trained professionals to support pupils, and an education system which motivates and engages learners, instead of one which causes many young people to feel under constant pressure." ... But we have taken real steps to ensure they are not on a constant treadmill of revision and testing, including ......

Uh Ho! Abhishek suffers from slipped disc, advised complete rest

Edit Pinkvilla 05 Apr 2016

As per a popular daily, actor Abhishek Bachchan has been advised rest for one whole month ... The source even added that, "The constant travel took a toll on him and aggravated his pain." ... ....

Irv Brown gets it done for last time

Edit Denver Post 05 Apr 2016

Brown worked with longtime partner Joe Williams for 35 years. Irv Brown was also the University of Colorado baseball coach during the 1970s ... In a radio landscape that has undergone seismic changes in recent years, Brown was a constant presence ... ....

Dear Lady Sitting Alone at the Mall

Edit Huffington Post 05 Apr 2016

Embed from Getty Images. I know that gaze. That vacant faraway look when you look at young children playing and tiny hands and feet jutting out from a mother's baby carrier. When a pregnant woman waddles by, I could almost hear that imperceptible sigh coming out of you ... You yearn, you long but are constantly met with disappointment ... Except it's due to a barren womb, broken dreams and constant quarrels with your spouse ... I feel you ... Anyway......

War-wounded military dog awarded charity medal

Edit BBC News 05 Apr 2016

A military dog who lost her leg on duty in Afghanistan is to receive a vet charity's medal honouring the work of animals in war. Lucca, a 12-year-old German Shepherd, suffered injuries including the loss of a leg during a search for improvised explosive devices (IEDs) in 2012 ... "I stayed with her constantly throughout her operation and her recovery ... Share this story About sharing. ....

Vandals target local playing fields (Wyong Shire Council)

Edit Public Technologies 05 Apr 2016

(Source. Wyong Shire Council). 05 Apr 2016. Vandals have struck at three of the Shire's sports facilities causing damage to playing surfaces at a time when Council's greenkeepers are working around the clock to prepare fields for a busy winter sports season ... All of the areas have received significant damage and will require constant maintenance throughout the season....

American soprano Tamara Wilson wins singers' Heisman Trophy

Edit The Associated Press 05 Apr 2016

NEW YORK (AP) -- Soprano Tamara Wilson has won the award dubbed the Heisman Trophy for singers. The Richard Tucker Award, along with a $50,000 cash prize, was announced Monday in New York ... 30 ... where you're constantly being judged, broken down, told from all different directions what you should be, how you should act, what you should wear, how you should sound." ... ....

Tyler Thompson Joins Long & Foster’s Tuckahoe Office in Richmond, Va. (Long & Foster Real Estate Inc)

Edit Public Technologies 05 Apr 2016

(Source. Long & Foster Real Estate Inc). Long & Foster Real Estate, the largest family-owned residential real estate company in the United States, welcomes Tyler Thompson to its Tuckahoe office, in Richmond, Va. Thompson will specialize in working with homebuyers and sellers ... 'The dynamics of today's residential real estate market are constantly changing ... For more information, visit LongandFoster.com....

Santita Daley Joins Long & Foster’s College Park Office in College Park, Md. (Long & Foster Real Estate Inc)

Edit Public Technologies 05 Apr 2016

(Source. Long & Foster Real Estate Inc). Long & Foster Real Estate, the largest family-owned residential real estate company in the United States, welcomes Santita Daley to its College Park office, in College Park, Md. Daley will specialize in working with homebuyers and sellers ... 'The dynamics of today's residential real estate market are constantly changing ... Original Document ... (noodl. 32903182) ....

The story of one NFL free agent shows how much influence the Patriots have over ...

Edit Yahoo Daily News 05 Apr 2016

View photo. (Christian Petersen/Getty Images). The New England Patriots have long been considered the NFL's model franchise when it comes to free agency and the NFL Draft. Bill Belichick hoard draft picks, constantly replenishes his offensive line in order to best protect the aging Tom Brady, and, in general, seems to have a unique knack for identifying and renewing underutilized talent ... Only because he was linked to the Pats! ... NOW WATCH....