what emblem did hester have to wear?why was she sentenced to wear it ?

Hester was condemned to wear the "Scarlet Letter," as punishment for adultery. The scarlet letter was the letter "A" and is a symbol of shame. It was meant to single out the wearer for their sin and ostracize them from the community. Hester's pregnancy and Pearl's subsequent birth were the reason she was publicly shamed by the Puritan community.