It's called 'opaque' (pronounced oh-pay-k).
Such a material is said to be transparent.
It's called 'opaque' (pronounced oh-pay-k).
A material that electricity can conduct electricity.
Refraction is caused when light changes the medium that it is moving through. Therefore any material that is transparent to light will diffract it.
A two way mirror, or as police call it, the "magic mirror".
resistance
Objects that allow most light to pass through are described as transparent. In contrast, translucent objects allow some light to pass through, but don't let you see objects. Opaque objects allow no light to pass through.
A material that allows heat or electricity to pass through it is called a conductor. The opposite of that is called an insulator. For electricity, the wire inside is the conductor, while the plastic on the outside is an insulator.
Light can pass through some materials. An example of a material like this would be glass. It cant go through all materials. When materials let light through, we call that transparency.
Nothing comes through. A red light emits no blue light, and a blue filter allows only blue light to pass ... that's why when you look at it, you say to yourself "Hey! That filter looks blue. I'll call it a 'blue filter'."
conductor
Those are the materials we loosely call "conductors".
An insulator.