# Homework Help: Angular resolution

1. Jan 26, 2013

### oldspice1212

Technological advances are now making it possible to link visible-light telescopes so that they can achieve the same angular resolution as a single telescope over 300 meters in size.

What is the angular resolution (diffraction limit) of such a system of telescopes for observations at a wavelength of 500 nanometers?

I was wondering if anyone has an idea on what the angular resolution formula is, I know there is one but I can't recall it..and when it says 500 nm it's 5.00*10^-9 m right? Been a while since I've dealt with waves.

2. Jan 26, 2013

### lewando

Why struggle with recollection when you can "look it up"? Try your favorite search engine, wiki, etc.
No, that would be 5nm. 1nm = 1*10-9 m.

3. Jan 26, 2013

### oldspice1212

^ Yeah sorry i meant -7 lol and I still can't figure it out, I need the diameter of the telescope or something... I think the formula is sin theta = 1.220 * wavelength/ diameter but I have no clue how to get the diameter?

4. Jan 27, 2013

### SteamKing

Staff Emeritus
How big was the single telescope? Hint: when you talk about the size of a telescope, you are talking about the diameter of the mirror which collects the incoming light.

5. Jan 27, 2013

### oldspice1212

300m?

6. Jan 27, 2013

### oldspice1212

nvm got it

Last edited: Jan 28, 2013
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