Generally speaking, a material that does not let electrons travel through it, a material that has a very high resistance to electron flow (electric current), is called an insulator.
Opaque.
Materials that allow light to pass through them are called transparent materials.
metal
The material you are referring to is called an insulator. Insulators have low thermal conductivity, which means they are not good at conducting heat and therefore do not let heat pass through easily. Examples of insulating materials include wood, rubber, and fiberglass.
A material that allows electricity to pass through it easily is called a conductor. Common examples of conductors include metals like copper and aluminum.
An impermeable material.
Metals are good conductors of electric charge because they have free electrons that can move easily through the material in response to an electric field. Examples of good conductors include copper, silver, and aluminum.
Insulators- do not let heat through
opaque.
They don't let neutrons or electrons through.
An opaque material.
Insulator
Yes
Plastic
Rubber.
Plastic.
Opaque.