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AT THE SUN
It is VERY DANGEROUS to look directly at the sun. NEVER LOOK DIRECTLY AT THE SUN!
The sun can
be observed by using a pin or a small nail to
Any small telescope with an external focal plane can be used in a similar way to project an image of the sun. During a solar eclipse it is possible to watch the image gradually become obscured by the moon.
Here's another way to watch it: Put a dishpan or other large container of water down onto the ground. Stand beside it, making sure your body does not cast its shadow into the pan. You can look into the container and see the sun reflected on the water. As you watch, you can see the reflection of the sun become obscured by the moon.
No direct observation techniques for viewing the
I think the
intense light of the sun (and probably other
scientist says: "Direct viewing of the sun,
Using a frosted
bulb as a light source, let the light from
Draw a pair of similar triangles on the chalkboard to diagram how the image is made. Calculate the size of the bulb, then measure to compare the actual size to the calculation.
Now let sunlight
pass through a pinhole in a card to form a
You can see
from the diagram that the ratio of the image's
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