在小学自然课中有关日、月食一节及教学参考书中,对地球和月球在阳光照射下会产生本影锥体、半影和伪本影现象及日、月食成因是通过示意图讲解的。 现有的三球仪产品只能演示日、月食产生的原因,但不能演示本影锥体和半影现象,更不能演示日全食、日偏食、日环食、月全食、月偏食及月半影食现象。 在晴天阳光下通过凸透镜、一个大球(用以模拟月球或地球)及白色投影板,可以清晰地演示本影锥体和半影现象。如果再加一个小球用以模拟月球,可做月食实验,能直接观察到月全食、月偏食和月半影食现象;当用一个大球模拟月球,投影板用于模拟地球表面,可做日全食、日偏食和日环食 In the elementary and western eclipse section of a natural lesson in elementary schools, and teaching reference books, the umbra cones, penumbra and pseudo-umbra shadows and the causes of solar eclipse in the sunlight on the Earth and the Moon are explained through schematic diagrams. of. The existing three-ball instruments can only demonstrate the causes of the eclipses, but they cannot demonstrate the umbral cone and penumbra phenomenon, let alone demonstrating total solar eclipse, partial eclipse, daily eclipse, total eclipse, partial eclipse and monthly Half shadow phenomenon. The umbra pyramid and penumbra phenomenon can be clearly demonstrated by the convex lens, a large ball (simulating the moon or the earth) and the white projection board in sunny sunshine. If you add a small ball to simulate the moon, you can do a lunar eclipse experiment. You can directly observe the total lunar eclipse, the partial lunar eclipse, and the lunar half-shadow phenomenon. When using a big ball to simulate the moon, the projection board is used to simulate the surface of the earth. Total solar eclipse, partial eclipse, and solar eclipse