Correct Answer: Prism
Prism.
Correct Answer: Prism
Usually glass.
Because acid does not react with glass, glass isn't contaminated by anything, and if it is you can see it. Glass also is clear so you can see what kind of chemicals are inside. And used over plastic because some acids react with plastic and plastic is not as clear when it needs to be as thick as glass does.
Plastic jugs do not break as easily.
Not all... Some spectacle-makers use plastic lenses instead of glass.
clear plastic or glass works ok
Acrylic is a useful, clear plastic that resembles glass. it is strond shatter resistant and waterproof.
refraction
Refraction
Refraction
Acrylic plastic is from a family synthetic, or man-made, plastic materials containg some acrylic acid. Acrylic plastic also called acrylic glass is a clear alternative to sheet glass.