A liquid lens is one where, rather than solid glass or plastic, the light is refracted through a liquid substance.
Liquid
A liquid has the the shape of the container.
no
Yes, contact lenses are considered a liquid by TSA regulations and should be packed according to the 3-1-1 rule for carry-on liquids.
liquid has a definite volume and takes on the shape of its container.
a liquid
Yes, contact lenses do not need to be placed in the liquid bag when going through TSA security. They can be kept in their case and carried separately in your carry-on luggage.
AnswerSince contact lenses are corrective lenses for contact with the eye, I presume you mean the general case with optics.The answer is that lenses can be in contact with each other and often are. But it is very difficult to put two lenses into contact without a gap, so these lenses are usually bonded together with optical cements.Lenses have been made with liquid elements between lenses, too.
Yes, contact lenses are considered a liquid when it comes to airline carry-on restrictions. They must be packed in containers of 3.4 ounces or less and placed in a clear, quart-sized plastic bag when going through security.
Particle pollution
A liquid is a state of matter that has a defined volume but no defined shape. In a liquid, particles are close enough to have a fixed volume, but not in a fixed position, allowing the substance to take the shape of its container.
How would you define a subtancebased on what you have obsrved