Which type of light is best described as casting light from a single direction across the entire scene?

• A. Point Light
• B. Directional Light
• C. Area Light
• D. Spot Light

Answer: (B)

Light coming from a distant source in parallel rays across the whole scene is the hallmark of a directional light. This type simulates sunlight or moonlight, where all light rays travel in the same direction, so every object is illuminated from that single direction regardless of its distance or position. In Unity, directional lights aren’t limited by distance and don’t fade with range, which reinforces the sense that the light comes from far away and covers the entire scene uniformly. Other lights—like point lights that radiate in all directions from a single point, spotlights that cast light in a cone, or area lights that emit from a surface—create lighting that changes with distance or position and don’t produce that single-direction, scene-wide illumination.