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[–] sadam029 ago 

How can something radiate without going in all directions?

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[–] nicethingyoucanthave ago 

Imagine looking at a car with a thermal camera. Not all portions of the car are equally hot. From certain angles, the car would be brighter, and from certain angles it'd be dimmer.

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[–] The_Cat ago 

By focusing the radiation.

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[–] sadam029 ago 

The actual radiation would be in all directions from the source, but would be blocked?