Minimum distance between stars so we see them as two distinct stars

[Revvi]

Homework Statement

Using a telescope with circular aperture of diameter 2.5 meters and wavelength 463 nm. The stars are 10E22 meters away from us. What does the distance between them have to be so we view them as two stars?

Homework Equations

angle = 1.22 x (wavelength/diameter) > Distance between them = 10E22 x angle

The Attempt at a Solution

Plugged in the values given into the equations above and I'm not getting the right answer.

 

[willem2]

You should get the right answer. Can you show us the calculation?

 

[Revvi]

Yep.

(1.22 x 463 E-9)/2.5 = 2.259...E-7

That's my angle q.

Then I do q x 10E22 > 2.259 E 16 meters