Lately I've been working on a SciFi setting, primarily focusing on space combat.
Something I've been working on is an energy shield that can reliably stop hypervelocity rounds (which are common in this setting). Due to (insert technobabble here) it stops physical objects, but is ineffective against light Never mind that light is particles, which are technically physical...
Looking around on Physics.SE I came across this post, from which I learned that light travels at the same velocity regardless of the velocity of whatever is producing it.
Pondering this, I had an idea: What if you strapped a big flashlight to the front of a hypervelocity round traveling infinitely close to the speed of light? If I read that post correctly, all the light produced in-transit would arrive at once, effectively being a full-powered laser at point-blank range.
The Question: Provided you could strap a flashlight to a hypervelocity round, could this work? If not, why?
This is a specialty round for a very specific application. I am aware that it is overkill for pretty much everything else.
Assume that the civilization making these can (a) get enough power to launch these at the required velocity and (b) ensure that it doesn't become a 0.999...c shotgun due to acceleration.
Most battles occur at ranges of several light-seconds.
By "big flashlight" I mean "generic large-scale light emitter". It can be scaled as necessary (although not up to the power of a ship-to-ship laser).
Yes, I know that a "regular" laser is more effective unless this is way more powerful than I thought. The general idea is for this to be a cool "Abnormal Ammo." As such, I'm primarily interested in whether or not this would be effective in its own right, not whether or not there are better alternatives (although suggestions for other Abnormal Ammo are welcome).
This is different from a Star Trek photon torpedo in that the light is created during transit, not upon detonation.