If you can see the faint glow of a lighted torch through an object, but not the torch itself, the substance is

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Opaque

Translucent

Transparent

None

answer is B.

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Detailed Solution

If you can see the faint glow of a lighted torch through an object, but not the torch itself, the substance is translucent.
The materials are classified into three types depending on the property that allows light through them. They are transparent, translucent, and opaque bodies. The objects that partially allow light to flow through them are called translucent materials. For example, if a torch light is an incident on a material, it is said that light passes partially through it. This means that the substance is translucent. In this process, the source of light cannot be viewed, so the torch itself cannot be seen.

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