Light of wavelength 469 nm passes through a slit, creating a diffraction pattern on a screen. The angular separation between the first diffraction minima on either side of the central maximum is 6.0∘

Question

Light of wavelength 469 nm passes through a slit, creating a diffraction pattern on a screen. The angular separation between the first diffraction minima on either side of the central maximum is 6.0∘
. Determine the width of the slit.

I used this equation to solve for the question 
aSin(theta)=(m)(lamda). Which give me 4.49mircrons, but that's not the answer

Anonymous · Accepted Answer

the theta should be 3.0 not 6.0 degree since it said on either side

Scott · Answer

Θ may be 3º ... the wording is ???