Which surface results in the least hazardous viewing due to diffuse reflection?

Which surface results in the least hazardous viewing due to diffuse reflection?

• A. Smooth polished mirror
• B. Non-reflective surface such as a wall
• C. Transparent glass
• D. Highly polished metal cabinet

Answer: (B)

Diffuse reflection is when light hits a rough surface and scatters in many directions, so no single reflected beam is very bright in any one direction. That spreading lowers the chance of a focused glare entering the eye, making viewing safer. A non-reflective wall does this naturally, yielding soft, widespread light rather than a sharp, intense reflection. In contrast, smooth surfaces like a polished mirror or a highly polished metal cabinet produce strong, directed reflections (specular), which can create bright glare in a specific line of sight and increase eye hazard. Transparent glass can transmit light but still produces surface and internal reflections that can be sharp and potentially hazardous in certain angles. So the non-reflective wall offers the least hazardous viewing because its diffuse scattering minimizes any concentrated reflections.

Diffuse reflection is when light hits a rough surface and scatters in many directions, so no single reflected beam is very bright in any one direction. That spreading lowers the chance of a focused glare entering the eye, making viewing safer. A non-reflective wall does this naturally, yielding soft, widespread light rather than a sharp, intense reflection. In contrast, smooth surfaces like a polished mirror or a highly polished metal cabinet produce strong, directed reflections (specular), which can create bright glare in a specific line of sight and increase eye hazard. Transparent glass can transmit light but still produces surface and internal reflections that can be sharp and potentially hazardous in certain angles. So the non-reflective wall offers the least hazardous viewing because its diffuse scattering minimizes any concentrated reflections.