optical Band Gap
preferred label: کاف نوار نوری @fa
type: Concept
broader: band gap

energy gap
preferred label: گاف انرژی @fa
type: Concept
related: band gap

band gap
narrower: optical Band Gap
narrower: Van der Waals gap
related: energy gap
preferred label: کاف نوار @fa
type: Concept

Van der Waals gap
preferred label: کاف واندروالس @fa
type: Concept
broader: band gap