人们将“电磁吸引力”“描绘成”是由于“称作”“光子”的“无质量的”自旋为1的“粒子”的交换所引起的。

The electromagnetic attraction is pictured as being caused by the exchange of large Numbers of virtual massless particles of spin 1, called photons.

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吸引力强时，金属片朝向电磁铁运动。吸引力弱时，金属片从电磁铁处弹回。

When the pull is strong, the disc is moved toward the electromagnet, and when the pull is weak, the disc springs away from the electromagnet.

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