2:04:42 UFO?
2:11:28 Kailash Peak (Mt. Kailash), India. Conducted experiments to attract certain life
2:22:50 Mato Thipila, Rapid City, Wyoming, "Devil's Tower", "Close Encounters of the Third Kind"（未知との遭遇）
2:24:00 Padmasambhava（パドマサンバヴァ）, Manjushuri（弥勒菩薩）
2:47:06 "Comparison is the thief of joy", Theodore Roosevelt
A natural and technically appropriate translation of
「遮光壁は、光源から出射された光を遮光する。」
is:
The light-shielding wall blocks light emitted from the light source.
遮光壁 → light-shielding wall
光源から出射された光 → light emitted from the light source
遮光する → blocks (or shields, shades, intercepts — depending on tone)
The light-shielding wall shields light emitted from the light source.
→ Slightly softer/more descriptive; good for optics contexts.
The light-shielding wall intercepts light emitted from the light source.
→ More precise in some technical applications (e.g., beam shaping).
The light-shielding wall cuts off light emitted from the light source.
→ Use this only if you're specifically referring to forming a cutoff line (e.g., in headlights).
Stick with:
“The light-shielding wall blocks light emitted from the light source.”
for a direct, clear, and widely used expression.
Great question — “shield” and “block” are related but not fully interchangeable, especially in technical contexts like optics or lighting. Their nuance and usage differ, and choosing the right word depends on what you're emphasizing.
| Aspect | Block | Shield |
|---|---|---|
| Meaning | Completely stops or prevents passage | Protects from or reduces exposure |
| Forcefulness | Stronger; implies total obstruction | Softer; implies partial or selective |
| Typical usage | “Block light,” “block access” | “Shield from glare,” “shield from radiation” |
| Implication | Stops something from going through | Protects something from something else |
| In optics | Used when light is cut off or prevented | Used when light is redirected, reduced, or controlled to protect an area |
“The wall blocks light from the source.”
→ Emphasizes cutting off or eliminating the light.
“The wall shields the driver from glare.”
→ Emphasizes protecting someone from unwanted light, not necessarily blocking it all.
Use “block” when the structure stops light entirely or defines a cutoff.
Use “shield” when it reduces, deflects, or protects against light.
遮光壁は、光源から出射された光を遮光する。
Both are possible, but:
“Blocks” is more literal: it stops the light.
“Shields” is more nuanced: it implies protection or controlled restriction.
So yes, they can sometimes be used interchangeably, but the tone and implication differ.
Excellent question — and you're right to focus on precision here.
“Light-shielding wall” is still preferred and more standard, even when the wall fully stops the light, especially in technical and patent contexts.
“Light-shielding wall” is a well-established term in optics, lighting systems, imaging devices, and patent literature.
It covers both partial and full blocking, and emphasizes the intentional function of controlling light.
“Light-blocking wall” sounds more like an obstacle or barrier that happens to block light — less elegant or precise.
It’s less commonly used in technical writing.
It implies purposeful design to manage light — whether to avoid glare, create a cutoff, or shape a beam.
“A light-shielding wall is provided to form a cutoff in the light distribution pattern.”
Not:
❌ “A light-blocking wall is provided…” (this is rare and less idiomatic)
Even when the wall completely stops light, stick with:
light-shielding wall
It’s more standard, precise, and idiomatic in technical and patent English.
