A Filter of some sort
An opaque envelope is an envelope that does not allow light to pass through it, making its contents hidden from view. They are often used for sending confidential documents or materials that require privacy.
The word you're looking for is "translucent." This term describes materials that allow light to pass through but scatter it in such a way that objects on the other side are not clearly visible. Examples include frosted glass or certain types of plastic.
Examples of translucent items include frosted glass, wax paper, and certain plastics like shower curtains or plastic bottles. These materials allow light to pass through, although they may not be completely transparent.
A vase can be translucent, but it depends on the material it's made from. Translucent vases allow light to pass through but do not provide clear visibility of objects behind them. Common materials like frosted glass or certain types of plastic can create a translucent effect, while other vases made of opaque materials would not be considered translucent.
A Filter of some sort
Translucent materials allow some light to pass through but scatter it, making objects on the other side blurry. Transparent materials allow light to pass through clearly, without scattering it.
Transparent materials allow light to pass through with little or no distortion, like glass. Translucent materials allow some light to pass through, but it scatters, making objects blurry, like frosted glass. Opaque materials do not allow any light to pass through, like wood.
Materials that allow light to pass through them are called transparent materials. These materials do not absorb or reflect light, enabling light to travel through them with minimal obstruction. Examples include glass, water, and clear plastics.
Transparent materials allow light to freely pass through them. Translucent materials also allow light to pass through them, but change the colour of the light.
permeability
That phenomenon is known as translucency. Translucent materials allow light to pass through them partially, resulting in a blurred or softened appearance of objects seen through them. Examples of translucent materials include frosted glass and wax paper.
Materials that allow light to pass through them are called transparent materials.
These terms refer to the ability of a material to allow light to pass through it. Transparent materials allow light to pass through clearly, translucent materials allow some light to pass through but not clearly, and opaque materials do not allow any light to pass through.
Materials that some light can pass through are called translucent materials. These materials allow some light to pass through them, but not as clearly as transparent materials like glass.
Transparent materials allow light to pass through them without significant scattering, resulting in clear visibility. Translucent materials allow some light to pass through, but it scatters in different directions, making objects on the other side appear blurry or diffused.
Those are called insulators.