a Fresnel lens

effective

to gather / to collect / to assemble

extraordinary, unusual

emergency

very; extremely / exceedingly; tremendously

(physics) photoelectric effect

a light, beam, illumination / a gleam, glow, ray / a glimmer, shine, sparkle / a luster/lustre, polish, sheen / glory, influence, power / a glimmer, gleam / positive aspect

effect / (judo) koka, points or the judge call to the points in the match of Japanese martial art of judo. less points to yuko.

a target, a mark, a bullseye / an objective, an object (of doing something)