Joke Collection Website - Talk about mood - You can make two convex lenses out of ice, talk about your method, and roughly measure the focal length of your convex lens in a simpler way.
You can make two convex lenses out of ice, talk about your method, and roughly measure the focal length of your convex lens in a simpler way.
Method of polishing convex lens:
Grind the ice cubes into an oval shape, as long as the middle is thick and the edges are thin, the ice cubes are uniform and there is no gap in the middle.
Focus measurement method:
Move one convex lens to face the sun and the other to face the wall, and change the distance from the convex lens to the wall. When a small and clear bright spot appears on the wall, measure the distance from the convex lens to the wall at this time, which is the focal length of the convex lens.
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