What color does a low-temperature light emit?

a higher temperature emits a blue light, whereas a lower temperature emits a light.

fill in the blank.

this is in my graphic design course & i believe it is science so i put it under science.

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent