This is typically referred to as an obstruction or blockage. It means that the object or substance is unable to move or pass through the barrier due to physical, size, or other constraints.
You cant see through opaque things, but you can see through transparent things.
Light cannot easily pass through opaque objects like wood, metal, and walls because these materials absorb or reflect light rather than allowing it to pass through. Additionally, dense materials such as lead and concrete are also difficult for light to pass through due to their high density.
Water cannot pass through a solid rock because the rock's structure is tight and does not have spaces for the water to flow through. The pores in the rock are too small for water molecules to move through.
Transparency.
Opaque objects have a dense molecular structure that does not allow light to pass through. The particles in the object absorb and reflect light, preventing it from transmitting through the material. This is in contrast to transparent or translucent objects, which have a molecular structure that allows light to pass through easily.
you cant our else you cant stop the forest fire
conduction is the ability of something to allow something else to pass through it. eg. a metal rod conducts heat water through a pipe electricity through a wire
Not necessarily. If something brittle were to crash into something hard, it would shatter before it could pass through. On a related note, however, there is a small but non-zero chance that something can pass through something else through quantum tunneling.
you cant
impermeable.
cholesterol
No, it means to pass into or through every part of something else. Such as the rain permeated the soil. It is neither positive or negative.
A padlock
If the cut off from tube dialysis will be larger than the insulin shape, insulin cant pass through it
an orifice is a hole in which something can be pass through.
you cant get thru it. the only way to do it is to ask the administrater
They can't because they arent real.