Check please

"not allowing" is OK in itself, but "It transmits the substance that is even opaque" does not make any sense. An opaque substance does not transmit light. The object of the verb "transmit" should be the light, not the opaque substance.

Oh sorry, it is completely wrong. I rewrite:
An electric wave partly transmits the substance that is as opaque as not to transmit a light.

This means that, for example, a wall allows an electric wave to pass through. But 'transmit a light'?

SupercatAn electric wave partly transmits the substance that is as opaque as not to transmit a light.

Unfortunately this is still wrong in multiple ways. Perhaps you are trying to say something like this:

Some/Many substances that are opaque to visible light are transparent to radio waves.

I'm going to do once again:
A part of an electric wave can pass through an opaque substance.

Not all potions of an electric wave, some or small part of it passes through. Thank you for your time!

SupercatI'm going to do once again:A part of an electric wave can pass through an opaque substance.

I have never heard of an "electric wave". Are you quite sure you don't mean "electromagnetic wave", as I suggested?

The concept of "a part of a wave" passing through something seems a bit odd to me.

In the proper sense, "opaque" means that n

Oh sorry I didn't check well. It's radio wave, as you said.
Really, then untransparent (I don't know if this is strictly correct and recommended to use though)?
Part of a radio wave can pass through an untransparent substance?

SupercatOh sorry I didn't check well. It's radio wave, as you said.Really, then untransparent (I don't know if this is strictly correct and recommended to use though)?Part of a radio wave can pass through an untransparent substance?

"untransparent" is rather ugly and seems anyway to contradict the first part. "part of a radio wave" still sounds odd. I am not c

Rather ugly lol.
"A semi-transparent substance allows some radio waves to pass" Thank you