When a black body cools down, at some point it no longer radiates light in the visible spectrum, giving off infrared photons instead.
当黑体变冷的时候,在一定的温度以下,它就不会再发出可见光而是放出红外光子。
The sun radiates light and heat.
太阳放出光和热。
The sun radiates light and heat.
太阳放射光和热。
Only the sun radiates light and heat in the solar system.
在太阳系中,仅有太阳放出光和热。
Only the sun radiates light and heat in the solar system.
在太阳系中,仅有太阳放出光和热。
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