As to why the relative motion of the Sun in the northern hemisphere should have come to dominate clock and watch design globally, the answer is probably that mechanical clocks were first widely developed in the northern hemisphere — a simple case of history being written by the victors or inventors, in this case. The subject would not have come up for many early clockmakers as many early clocks did not have hands at all, but rather, struck the hours on a bell or gong. However, that clockwise motion of clock and watch hands derives from astronomical observations in the northern hemisphere, and from the development of clockmaking in northern European nations, can seem culturally chauvinistic, and there have been attempts to make anticlockwise motion of the hands a standard — in , Bolivia's national congress building in La Paz received a new clock whose hands move anticlockwise.
I think it might eventually be possible, but then what happens? In an interview with The Guardian , Bolivia's foreign minister, David Choquehuanca, said, "We're in the south and, as we're trying to recover our identity, the Bolivian government is also recovering its sarawi, which means 'way' in Aymara," he said. There are other public clocks with hands that move counterclockwise — one of the most famous examples is the great clock of Paolo Uccello, inside the Duomo; and in Prague, the Jewish Town Hall tower has two clocks; one has Roman numerals, and runs clockwise; the other has Hebrew letters on the dial, and runs counterclockwise.
Of the clock, Rabbi Harlan J. Wechsler has written, "Going counterclockwise is not entirely strange to Jews. That custom comes from the procedures of the priests in the Temple who walked up the slanted front of the altar and then would proceed counterclockwise around its periphery performing their required functions. If you want a watch with counterclockwise hands, you must expect thin pickings; for obvious reasons this is not a stock-in-trade for serious watch brands or even semi-serious ones.
However, there are a few out there — I've dug up a Swiss-made watch with the unlikely name of Bolshevik , which has counterclockwise hands in homage to the Left, no doubt and if you hunt around on Ebay, it is not difficult to find Seiko Lorus quartz "Goofy" watches, with counterclockwise hands which is, you know, a goofy way for them to run, in case you missed the joke.
The video goes into detail, but the big nugget here is about sundials. If you jab a stick into the ground to make a sundial with the stick serving as the sundial's gnomon in a Northern Hemisphere country like Egypt, the shadow you'd tell time by moves in a clockwise direction. That's due to the rotation of the Earth. If you made the same sundial in South Africa, located in the Southern Hemisphere, the shadow would move counterclockwise.
As clock technology progressed and moved away from sundials, the hands of a clock continued to move in a clockwise direction. Let us understand the meaning of this term now.
The clock is an instrument that shows time. The hands of a clock always move towards their right and hence, the term 'clockwise' explains itself. Most screws and bolts are tightened by turning them clockwise. The circular lids of bottles that we use are also closed by turning them clockwise. Clockwise and anticlockwise are terms that can only be applied to a rotational motion. Clockwise motion proceeds within the same direction as that of a clock's hands.
Moving from the top to the right, then down and then to the left, and back up to the top. Anticlockwise can be considered as the opposite sense of rotation or revolution. In the image given above, the letter "F" is rotated clockwise. Note that although the direction of the letter has changed but the size of the alphabet "F" remains the same.
This shows that the symmetrical aspect of a shape does not get affected on rotation. There are many examples that make us notice these movements every day, like, the taps are closed clockwise, screws are tightened clockwise, angles are measured anticlockwise, and many more. Angles describe the amount and direction of rotation and are always measured anticlockwise on a line. It should be noted that angles that are measured clockwise are negative angles.
Have a look at the protractor given below which shows how the angles are measured. Clockwise and anticlockwise are ways of indicating the direction of a turn. Login or Register to add to your saved resources. When something moves in a clockwise direction, it is moving in the same direction as the hands on the clock: When something moves in an anti-clockwise direction, it is moving in the opposite direction:. The language of direction in primary school Children start learning the language of direction in Year 1 , when they talk about whole, half, quarter and three-quarter turns.
By the end of Year 2 , they should be able to talk about these turns, but to explain which direction they are going in, clockwise or anti-clockwise. During Year 2, children will also learn to tell the time to the quarter hour, so they should be aware of the direction the hands on the clock go.
Teachers will help children practise directional language by: getting them to stand up and make quarter, half and whole turns in either a clockwise or an anti-clockwise direction putting the children into pairs and asking them to give each other directions giving the children a small doll or figurine and giving them activities where the doll has to be moved in a certain way.
Learning about quarter, half and whole turns is the foundation for learning about angles , a concept which is built on gradually, year after year.
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