Which term describes something that does not allow light to pass through?

Which term describes something that does not allow light to pass through?

• A. Filter
• B. Prism
• C. Visible spectrum
• D. Opaque

Answer: (D)

The main idea is how a material handles light transmission. When light cannot pass through a material, that material is opaque. It either reflects light off its surface or absorbs it, so you can’t see through it—like a brick wall or a metal sheet. A filter is something that lets certain wavelengths through while blocking others, so it doesn’t necessarily stop all light. A prism changes the direction of light and can separate wavelengths but still transmits light. The visible spectrum is just the range of wavelengths we can see, not a property of a material’s transparency. So the best term for “not allowing light to pass through” is opaque.

The main idea is how a material handles light transmission. When light cannot pass through a material, that material is opaque. It either reflects light off its surface or absorbs it, so you can’t see through it—like a brick wall or a metal sheet.

A filter is something that lets certain wavelengths through while blocking others, so it doesn’t necessarily stop all light. A prism changes the direction of light and can separate wavelengths but still transmits light. The visible spectrum is just the range of wavelengths we can see, not a property of a material’s transparency. So the best term for “not allowing light to pass through” is opaque.