Answer:
Timbre
Explanation:
Timbre: The character or quality of a musical sound or voice as distinct from its pitch and intensity.
Answer:
Glass is the most common material used to construct lens elements, due to its good optical properties and resistance to scratching. Other materials are also used, such as quartz glass, fluorite, plastics like acrylic (Plexiglass), and even germanium and meteoritic glass.
