Assertion: laser | /r/HasProperty | invented
Facets:
Source sentences:
text: When lasers were first invented, the speckle effect was considered to be a severe drawback in using lasers to illuminate objects, particularly in holographic imaging because of the grainy image produced.
text: During the Cold War, the United States poured millions into laser weapon development (even before the first laser was invented) and since then US defense contractors have worked on projects for fixed ground-based lasers, armor-mounted lasers, shipborne lasers, lasers on aircraft, and even orbital laser weapons.