Weird question about motion of light

So I was thinking about this weird question while waiting for my long exposure photo to finish...

Say I'm on a deck of a moving cruise ship, and trying to take a picture of a light fixture mounted on the ship with a relatively long exposure like a few seconds. Assuming the light fixture is mounted on a metal rod, so will not sway with motion, would the resulting picture show light motion (light trails) or would it come out like it was taken on stable ground?

lol, please post if you know so you can satisfy my curiosity. Thanks!

If both the camera and the subject (light fixture in your case) are firmly mounted on the same ship, they will be static relative to each other and therefore, the subject in the picture will be as sharp just as it was taken on the stable ground, even with long exposures.
Background, (if it is not part of the same ship, e.g. sea, sky, stars, shoreline, etc) will be blurred and smudged, though.

The speed of light is very, very high. High enough that you could consider it infinitely high for this purpose.

So if the camera and the lamp have fixed positions and orientations relative to each other, then you will get a good photo even when the ship is moving.

The only thing that will happen, because of the moving ship, is that the sun will move in relation to the ship. So if you photograph a shiny sphere, then the sun will not be a single spot on the sphere but will paint traces according to how the ship is moving and twisting.

Thanks for the quick responses!

When you're sitting in your living room at home and take a long exposure of a light there, you see no light trails despite the fact that:

The Earth's surface is rotating at around 750 kph
The Earth is rotating around the Sun at around 100,000 kph
The Solar System is rotating around the centre of the Milky Way at around 750,000 kph
The Milky Way is moving through the universe at around 2,000,000 kph

hollis_f wrote in post #14941107
The Earth's surface is rotating at around 750 kph
The Earth is rotating around the Sun at around 100,000 kph
The Solar System is rotating around the centre of the Milky Way at around 750,000 kph
The Milky Way is moving through the universe at around 2,000,000 kph

so we're all moving very fast, we just don't realize it.

watt100 wrote in post #14943549
so we're all moving very fast, we just don't realize it.

No we are moving very slowly, compared to the speed of light.

ejenner wrote in post #14944440
No we are moving very slowly, compared to the speed of light.

The light between your camera and subject is moving at 1,079,252,849 km/h. At light speed, you could circle the globe (at the equator) about 7.5x per second. Light is FAST.