SolarChat!

is there any information to be gained if instead of one slit you had 2 slits next to each other ?
not necessarily for solar either

John,
No.
The resulting spectral image would corrupted by the second entrance slit.
Why do you ask?

interference pattern might hold some info?

i'm thinking more for star images - defocused then light passing thru
like double slit experiment -- but add grating