Why does the sky go black when a nuclear bomb goes off?

Answer 1

Because the force of the explosion sends dust and debris into the air and the fires created by the explosion send dark smoke into the air, keeping sunlight from penatrating until it disperses.

Answer 2

It doesn't what you are seeing in the old films is the aperture of the cameras closing from the extremely brilliant light from the core of the explosion thus surrounding ares not enough light to for the film to pick up by contrast. Sensitivity of the film produces the same effect. Look att eh old film of the Hindenburgh exploding same thing the "Sky" goes black at the height of the explosion though it occurred in broad daylight.

Answer 3

It's not actually black, the bomb just pulls up a lot of dirt and soil that blocks out the sun like a thick layer of clouds

Answer 4

I do not know why it would. The flash is very intense, and any camera or eyeball would be saturated by the intensity and would not see color. But if you were looking at the sky with the bomb blast shielded, it would still be blue until it was overcome by smoke and debris.

Bozo

Answer 5

because the smoke from the fire it causes clouds the air causing it to turn black

Answer 6

because all of the dust&dirt blocks the sun rays.

Answer 7

I don't think I would stick around to find out . . .