Asante sets n1 = 1.05 and varies 1 until he reaches the angle at which no light is refracted (this is the critical angle c). Now he varies n1 and Bella observes how c changes. What does Bella say she observes as a result? "As n1 increases, c decreases." "As n1 increases, c first decreases, then increases." "As n1 increases, c remains constant." "As n1 increases, c first increases, then decreases