Science Buddies: "Ask an Expert"

Hello everyone,
It is great to be back in Ask an expert. i would like to know the purpose of this project in the natural world. My project is called star bright, star light how does light change with distance? I know the purpose but what could i use it in real life. like for exapmle could it sve something or could it further technology

I am not sure if this will help , but you could examine the effect of distance on different frequencies of light. You could then determine the most effective light forlonger distance viewing, which could be valuable in stop signs, exit signs, emergency lights, etc.

Quang,

I recommend reading about the "inverse-square law", which describes how the intensity of light decreases with distance from the source. Think about how this applies to flashlights, streetlights, any lights you see in everyday use. You might also be interested in reading about laser (coherent) light and how that behaves a little bit differently.

http://en.wikipedia.org/wiki/Inverse-square_law
http://imagine.gsfc.nasa.gov/YBA/M31-ve ... -more.html

Amanda

Thank you all,
I really thank all for helping me and it did help me a lot.

Hola Sciencebuddies,
I still need help with thiz project. What i dont get is how to make it more intressting for the project. My question is How deos light intensity change with distance. i need more variables and question that are more intresting.I also need another purpose for using this as a useful thing in real life.

Another use for this type of information in real life may be seeing car headlights, especially while passing on two lane roads.

Audrey