or ha'olam (×ור העול×)
in the light = ba'or (באור)
"Or" (אור).
light of the world = or ha'olam (אור העולם)
Or yafeh (אור יפה)
to a man: atah ha-or. to a woman: at ha-or.
Good world = "'olam tov" (עולם טוב)
I think you meant to say "the best IN the world". It is hatov ba'olam.
ani or ha-olam (×× ×™ אור העולם)
to a man: ata olami to a woman: at olami
You say 'Yalda' in Hebrew
ra'av olami (רעב עולמי)
Translation: Ha-olam hazeh (העולם הזה)