“Quartz-sapphire and quartz-lanthanum fluoride achromats provide better performance.”

“This behavior is also common in two-material waveplates such as achromatic waveplates constructed from quartz and magnesium fluoride plates.”

“So then put the pros and cons up for the public to decide if they want fluoride in their water.”

“But last year's Nobel Prize co-winner for medicine thinks fluoridation is a bad idea.”

“Mr Martin, who supports fluoridation, said the forum would examine alleged links between fluoridation and cancer and osteoporosis.”

“In addition to fluoridation of water supplies, toothpaste and mouthwash also contain added fluoride.”