SB2 - OBJECT - CLOCKS

Sundials had been used for timekeeping since Ancient Egypt. Ancient dials were nodus-based with straight hour-lines that indicated unequal hours—also called temporary hours—that varied with the seasons. Every day was divided into 12 equal segments regardless of the time of year; thus, hours were shorter in winter and longer in summer.

The sundial relies on shadows to provide a good estimate of the hour on a sunny day.

The Prague astronomical clock is a medieval astronomical clock located in Prague. An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets.

FACTS

1. With the invention of the pendulum clock in 1656, Christiaan Huygens increased the best accuracy of clocks from 15 minutes deviation a day to around 15 seconds a day. – Source

2. An Institute in Colorado created a clock so accurate it won’t lose/gain a second in 20 million years. This is the clock used for internet time. – Source

3. Two scientists proved time dilation by each flying around the world (east and west) carrying 4 synchronized atomic clocks. Upon landing, they compared them to atomic clocks they’d left on the ground and found that their clocks were no longer in sync. – Source

4. The Big Ben is the name of the largest of the five bells which hang within the clock and not the name of the landmark clock. – Source

5. Pennies are used to adjust the time in London’s Big Ben clock tower. A single penny can change the pendulum’s center of mass and alter the time by 0.4s per day. – Source

6. Artist Siren Elise Wilhelmsen designed a clock that knits a scarf every year. – Source

7. For those who have trouble sleeping researchers say that 1 week of camping, without electronics resets our biological body clock and synchronizes our melatonin hormones with sunrise and sunset. – Source

8. “o’clock” is a contraction of “stroke of the clock” and comes from 15th century references to medieval mechanical clocks. – Source

9. Clockwise and counterclockwise were originally sunwise and widdershins before clocks were common. – Source

10. When you look at a clock, and the second hand seems to freeze for a moment, your brain is actually generating a false memory, and your perception of time stretches slightly backward. This effect is called chronostasis. – Source

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Film and TV -

3 famous clocks

1.     Big Ben – London, England – third tallest free-standing clock tower in the world

2.     Philadelphia City Hall, US – 548 feet tall, 4 clock faces on each of its sides – clocks measuring 26 feet in diameter

3.     Makah Royal Clock Tower Hotel, Saudi Arabia – 1,972 feet – world’s largest clock face

A surrealist painter, the Spanish Salvador Dali is one of the most enigmatic artists of the twentieth century. Known for his weird and outlandish subject matter, Dali's most famous work of art is probably The Persistence of Memory (1931), often called just "Clocks" and widely regarded as a Surrealist masterpiece.

Clocks in Adverts -