reflector

reflect, light, sound, radio waves, etc.

reflection, reverberation / reflex (automatic response)

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

mirror

a mirror (smooth reflecting surface) / Short for 鏡餅 (kagami mochi): a set of mochi rice cakes used in New Year celebrations / Short for 鏡物 (kagamimono):

mirror / speculum / pattern, model, example

a female given name / a surname

mirror

蛍(ほたる)の光(ひかり)窓(まど)の雪(ゆき) (hotaru no hikari mado no yuki, “firefly's dim light, snow reflected on the window → diligent study”)