The object he is to work on emits a bright light.

Such objects emit signals particular to their type, do they not?

It had been long known that thermal objects emit light.

And yet it was clear that physical objects emitted light, which led to unsolved problems.

The object itself was red in color and emitted a bluish white glow.

Of course some hot objects emit radiation in the visible range - they glow.

Why do objects emit electromagnetic radiation when they are heated?

"Brightness" refers to a subjective sense that the object considered is emitting light.

The two figures had disappeared, and the object was emitting an ominous roar again.

The calculation results in the object supposedly emitting infinite amounts of energy.