<p>I'm creating an application which will simulate the light created by sun or moon on a 3d topographic map of Earth. Something like this:</p>

<p><a href="https://i.sstatic.net/9LLt1.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9LLt1.jpg" alt="map"></a></p>

<p>Is there a word or definition for this light/light projection?</p>

CC BY-SA 4.0
2019-03-08T15:36:59.330Z
Can you provide a sentence that you'd use it in, as an example? That might help provide a better context.
zephyr
CC BY-SA 4.0
2019-03-08T16:41:21.113Z
We need some more details. Do you want spectral irradiance or just a mean value in the visible range?  Are you interested in irradiance magnitude, angle of incidence on the Earth's surface, etc.?    There are very powerful applications called Ray Tracers for this but it's not clear how much detail you're after.
Carl Witthoft
CC BY-SA 4.0
2019-03-09T21:49:56.353Z
What do you mean "projected" and "luminary"? The Sun's light is *radiated* and is called *sunlight* but when it reaches the Earth's atmosphere it is also *scattered*. The light of the Moon is mostly *reflected* sunlight and is called *moonlight*. The light of other celestial bodies is either radiance (e.g. stars, gases) or reflection (e.g. planets) and is loosely called *starlight*. The effect of illumination on an uneven surface is *light and shadow*. Which of all these are you after? For "a word or definition", this question (if clarified) might be better suited to [elu.se].
Chappo Hasn't Forgotten
CC BY-SA 4.0
2019-03-10T07:03:24.360Z
@zephyr:I don't know how I can use it in a sentence, I'm looking for this definition to be used as the name of my application.
dstr
CC BY-SA 4.0
2019-03-10T07:05:15.073Z
@CarlWitthoft: No I don't need or use irradiance in my app.
dstr
CC BY-SA 4.0
2019-03-10T07:08:15.673Z
@Chappo: Thanks for the info. I might check it out.
dstr
<the-sun><the-moon><light><definition>
Definition of the light that is projected by a celestial body/luminary
dstr
# Definition of the light that is projected by a celestial body/luminary

(Asked by: username_0 on 2019-03-08)

I'm creating an application which will simulate the light created by sun or moon on a 3d topographic map of Earth. Something like this:

[![map](https://i.sstatic.net/9LLt1.jpg)](https://i.sstatic.net/9LLt1.jpg)

Is there a word or definition for this light/light projection?

**Tags:** the-sun, the-moon, light, definition
> **Comments:**
> **username_1**: Can you provide a sentence that you'd use it in, as an example? That might help provide a better context.  
> **username_2**: We need some more details. Do you want spectral irradiance or just a mean value in the visible range?  Are you interested in irradiance magnitude, angle of incidence on the Earth's surface, etc.?    There are very powerful applications called Ray Tracers for this but it's not clear how much detail you're after.  
> **username_3**: What do you mean "projected" and "luminary"? The Sun's light is *radiated* and is called *sunlight* but when it reaches the Earth's atmosphere it is also *scattered*. The light of the Moon is mostly *reflected* sunlight and is called *moonlight*. The light of other celestial bodies is either radiance (e.g. stars, gases) or reflection (e.g. planets) and is loosely called *starlight*. The effect of illumination on an uneven surface is *light and shadow*. Which of all these are you after? For "a word or definition", this question (if clarified) might be better suited to [elu.se].  
> **username_0**: @zephyr:I don't know how I can use it in a sentence, I'm looking for this definition to be used as the name of my application.  
> **username_0**: @CarlWitthoft: No I don't need or use irradiance in my app.  
> **username_0**: @Chappo: Thanks for the info. I might check it out.  

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## 0 answers

