Sunday, 14 February 2016

Gravitational waves and The Theory of Relativity

AN IDIOT'S GUIDE TO...

The Theory of Relativity

Albert Einstein
Albert Einstein explained that what we perceive as the force of gravity in fact arises from the curvature of space and time.
He found that space and time were actually interwoven into a single continuum known as space-time.
As he worked out the equations for this general theory of relativity, Einstein realised that massive objects caused a distortion within this continuum.
Imagine a large body in the centre of a trampoline. The body would press down into the fabric, causing it to dimple. If a marble was then rolled around the edge, it would spiral inward toward the body, pulled in much the same way that the gravity of a planet pulls at rocks in space. 
He proposed that objects such as the sun and the Earth work in a similar way. In the presence of matter and energy they can evolve, stretch and warp, forming ridges, mountains and valleys that cause things moving through to zigzag and curve. 
Einstein determined that massive objects (like the Earth) cause a distortion in space-time which is felt as gravity.
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Contents of the day

Article of the Day

The Shrine of the Book

The Shrine of the Book is the wing of Jerusalem's Israel Museum that houses the Dead Sea Scrolls, a collection of ancient documents found between 1947 and 1956 in caves on the Dead Sea's northwest shore, at Qumran. Funded by the family of David Samuel Gottesman, a philanthropist who purchased the scrolls as a gift to Israel, the shrine features an unusual white dome that covers an underground structure. How does the museum ensure that the fragile scrolls survive the rigors of being displayed? More... Discuss

This Day in History

Buchenwald Concentration Camp Liberated by American Troops (1945)

Buchenwald was one of the first and largest concentration camps in Nazi Germany. As US forces closed in on the camp near the end of WWII, the Nazis began evacuating its prisoners, forcing them on "death marches" during which an estimated 13,500 were killed. On April 9, inmates at the camp used a makeshift radio transmitter to inform the Allies about the evacuations and beg for help. What did the prisoners do when they received word that the Americans were coming to liberate them? More... Discuss

Today's Birthday

Charles Evans Hughes, Sr. (1862)

Hughes was an American statesman and jurist. He served as governor of New York and as a Supreme Court justice before losing the 1916 presidential race, one of the closest in US history. It has been reported that, on the night of the election, Hughes went to bed believing he had won. According to the story, a reporter later called and was told that "the president is asleep," to which he responded, "When he wakes up, tell him he isn't the president." What did Hughes do after losing the election? More... Discuss

In the News

off-licence discuss

Definition:(noun) A store that sells alcoholic beverages for consumption elsewhere.
Synonyms:liquor store, package store
Usage:He went into an off-licence to buy a bottle of cider.

Quote of the Day
There is no excellent beauty that hath not some strangeness in the proportion.
Francis Bacon
(1561-1626) Discuss