STEP 5: Set a timer and check on your sundial at different intervals during the day. Mark the time and placement of the pencil’s shadow to tell what time it is. The more accurate you want to be, the more makings you will need. Now you can use your sundial to tell the time, on ...
Choose an unshaded area to set up your sundial. Put the stick or pencil in the ground, or in a large piece of modeling clay, if your space is on a concrete or wooden surface. Step 2 Observe the stick's shadow carefully over the course of the day. Add a stone to your sundial for...
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This sort of sundial has a vertical face, which means you need to be standing to use it. And in order for it to get sun and cast a shadow, you need to face due south if you’re in the north hemisphere. If you are in the southern hemisphere, you must face north. Depending on yo...
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These dials also need to be oriented correctly; however, they usually have a magnet inside to help with this. How Sundials Work Sundials work by the sun casting a shadow on the sundial’s gnomon. When the sun is at it highest point of the day, or midday, the shadow is the shortest....
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2 Th e following pictures an d captions show you how to mak e your own sundial. Put th e steps in th e correct order. a Go out with th e bucket/'bAkit/ at 7: 00 a.m.an d put it down on th e ground. Mark the shadow of th e stick with a stone. Write"7"on th e ston...
HOW THE SUN'S RAYS CAUSE RANGES OF SHADOWS For a sundial, the sun rotates around the earth, and as there are 360 degrees in a circle and 24 hours in a day, that means the sun rotates around the earth's polar axis 15 degrees per hour. Those 15 degrees define solar time, and as ...
However, sundials have a few drawbacks. Aside from the obvious problem of not being able to read a sundial when the sun isn't visible, relying on Earth's daily rotation (also known as astronomical time) is surprisingly inaccurate. "The rotation is not precisely constant," Whibberley said....