Does the sun make a new moon invisible?
Yes, for the most part. The moon is very near the sun, and in fact the moon obscures the sun if they are close enough to form an eclipse. The brightness of the sun overpowers any reflected light originating from the earth. However, “new moon” can also refer to the very first sliver of crescent formed after the astronomical moment of new moon. Sometimes this sliver is visible for a short time very soon after sunset.
