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Sky Oddities • Atmospheric Optics • Fog, Cloud & Shadow Phenomena
Glories, fogbows and atmospheric spectres are strange optical phenomena created when sunlight interacts with tiny cloud or fog droplets near the observer. They can produce ghostly white bows, colored rings around shadows and giant human-like silhouettes projected onto mist or cloud.
TL;DR: What Are Glories, Fogbows and Atmospheric Spectres?
These phenomena form when sunlight is scattered, diffracted, reflected or backscattered by tiny water droplets in fog, cloud or mist. A fogbow looks like a pale rainbow, a glory appears as colored rings around the observer’s shadow, and a Brocken spectre is a giant shadow projected onto fog or cloud.
When Your Shadow Becomes a Mountain Ghost
Few atmospheric optics look as eerie as a human shadow enlarged onto fog, surrounded by colored rings, floating above a valley or cloud deck. The effect can feel supernatural, especially when the shadow moves exactly as you move.
But the physics is natural. These displays occur when the Sun is behind the observer and tiny droplets in fog or cloud scatter light back toward the eye. The result can be a Brocken spectre, a glory, a fogbow or a combination of all three.
What Causes Glories, Fogbows and Spectres?
These phenomena are observer-centered. That means their position depends strongly on where you are standing, where the Sun is, and where the fog, cloud or mist lies in front of you.
- Sun behind the observer: the light source must usually be behind you.
- Fog, cloud or mist ahead: droplets must be in front of you or below you.
- Tiny water droplets: droplet size affects color, brightness and shape.
- Backscattering: light is redirected toward the observer.
- Diffraction: light waves spread and interfere, creating rings and pale bows.
Explore the Main Fog, Cloud & Shadow Optics Guides
Brocken Spectre Explained
Learn why a giant human-like shadow can appear on fog, cloud or mist, often surrounded by eerie colored rings.
Glories Explained
Discover how tiny cloud droplets create colored rings around shadows, aircraft silhouettes or the antisolar point.
Fogbows Explained
See why fogbows look like ghostly white rainbows and how tiny droplets wash out most of the color.
Main Types of Observer-Centered Atmospheric Optics
Brocken Spectre
A Brocken spectre appears when the observer’s shadow is projected onto fog, cloud or mist below or ahead. Perspective can make the shadow look huge, distorted or ghost-like.
Glory
A glory appears as one or more colored rings around the antisolar point, often surrounding the observer’s shadow. It is commonly seen from mountains, aircraft or cloud tops.
Fogbow
A fogbow is a pale, white or faintly colored bow formed by tiny fog droplets. It resembles a rainbow, but the droplet size is so small that diffraction softens and washes out the colors.
Aircraft Glory
An aircraft glory appears as colored rings around the shadow of an airplane projected onto clouds below. It is often visible from passenger windows when the Sun is behind the aircraft.
Cloudbow
A cloudbow is similar to a fogbow but forms in cloud droplets. It can appear as a pale arc or circular bow when viewed from above clouds.
Brocken Spectre vs Glory vs Fogbow
| Phenomenon | What It Looks Like | Main Cause | Best Viewing Location |
|---|---|---|---|
| Brocken spectre | Giant shadow on fog or cloud | Observer’s shadow projected onto mist | Mountains, ridges, cliffs, cloud edges |
| Glory | Colored rings around shadow or antisolar point | Backscattering and diffraction by tiny droplets | Aircraft, mountains, clouds, fog banks |
| Fogbow | Pale white or faint rainbow-like bow | Light interacting with tiny fog droplets | Fog, sea mist, valleys, cold humid mornings |
| Cloudbow | Pale bow seen in clouds | Cloud droplets scattering sunlight | Aircraft or high mountain viewpoints |
| Rainbow | Bright colored arc | Refraction and reflection in larger raindrops | Rain showers opposite the Sun |
The Science Behind the Ghostly Effects
Backscattering
Backscattering occurs when light hits droplets and is redirected back toward the observer. This is essential for glories and many shadow-centered optical effects.
Diffraction
Diffraction happens when light waves bend and spread around tiny droplets. It helps create the colored rings of a glory and the washed-out appearance of fogbows.
Droplet Size
Larger raindrops produce sharper rainbow colors. Tiny fog or cloud droplets produce broader, paler, softer bows and rings.
Observer Geometry
These phenomena are intensely personal. They form around the antisolar point from your perspective, which means another observer may see a slightly different version.
How to Recognize These Phenomena
- Sun behind you: most glories, fogbows and spectres appear opposite the Sun.
- Fog or cloud in front of you: droplets must be available to scatter light.
- Look for your shadow: Brocken spectres and glories often form around it.
- Check elevation: mountains and aircraft are ideal because shadows can project onto clouds below.
- Notice color strength: fogbows are pale; rainbows are vivid; glories are ringed and compact.
Why Brocken Spectres and Glories Are Mistaken for Paranormal Signs
A giant human-shaped shadow on fog is exactly the kind of thing our brains are designed to overreact to. Add colored rings around the figure, shifting mist and mountain silence, and the result can feel deeply supernatural.
In reality, the giant “spectre” is usually your own shadow, magnified by perspective and projected onto droplets. The sky is not summoning a mountain ghost. It is just using you as the special effect, which is rude but efficient.
Best 301 Redirect Targets for Older Fog, Glory and Spectre Articles
- Giant shadow, mountain ghost or Brocken spectre posts: redirect to Brocken Spectre Explained.
- Colored rings around shadows, aircraft rings or glory posts: redirect to Glories Explained.
- White rainbow, fog rainbow, sea fog bow or cloudbow posts: redirect to Fogbows Explained.
- General ghostly atmospheric optics posts: redirect to Glories, Fogbows & Atmospheric Spectres Explained.
Glories, Fogbows & Atmospheric Spectres FAQ
What is a Brocken spectre?
A Brocken spectre is a large shadow of an observer projected onto fog, cloud or mist, often seen from mountains or high viewpoints.
What is a glory?
A glory is a set of colored rings that appears around the observer’s shadow or the antisolar point when sunlight is backscattered by tiny cloud or fog droplets.
What is a fogbow?
A fogbow is a pale white or faintly colored bow formed when sunlight interacts with tiny fog droplets.
Why are fogbows mostly white?
Fog droplets are much smaller than raindrops, so diffraction spreads the colors and makes the bow appear pale or nearly white.
Are Brocken spectres paranormal?
No. A Brocken spectre is a natural optical effect caused by the observer’s shadow being projected onto fog or cloud.
Where can glories be seen?
Glories are often seen from aircraft, mountains, cliffs or high viewpoints when the Sun is behind the observer and cloud or fog droplets are below or ahead.
