Here's the question you clicked on:
Idealist
A slit 1.00 mm wide is illuminated by light of wave-length 589 nm. We see a diffraction pattern on a screen 3.00 m away. What is the distance between the first two diffraction minima on the same side of the central diffraction maxi-mum? (Answer: 1.77 mm)
Did you attempt to use the formula? This seems quite straightforward.
I don't know what formula to use.
Did your teacher derive the formula \(\lambda = \frac{ax}{D}\)?
I don't have a teacher. I'm self-teaching myself right now. But if that's the right formula, then are we solving for D? What are a and x? I know the other one must be the wavelength.
Never mind. Now I get it. Thanks for the help.
lol you're welcome :) though you might want to look up on the limitations of that formula.