Help With Simple Single Slit Diffraction Pattern?

[bmb2009]

Homework Statement

Plane light waves are incident on a single slit of width 2.45 cm. The second dark fringe is observed at 44.3° from the central axis. What is the wavelength of the light?

Homework Equations

θ=pλ/a... where theta is in radians, p =2 (second light minimum), and a = slit width

this seems like it should be a simple problem but I can't get the answer..any Help?

The Attempt at a Solution

I tried

44.3°=.7732 rad so .7732=(2)(λ)/.0245 and solved for λ. Also, does come out in nano meters or meters?

Thanks for your help!

 

[PeterO]

Homework Statement

Plane light waves are incident on a single slit of width 2.45 cm. The second dark fringe is observed at 44.3° from the central axis. What is the wavelength of the light?

Homework Equations

θ=pλ/a... where theta is in radians, p =2 (second light minimum), and a = slit width

this seems like it should be a simple problem but I can't get the answer..any Help?

The Attempt at a Solution

I tried

44.3°=.7732 rad so .7732=(2)(λ)/.0245 and solved for λ. Also, does come out in nano meters or meters?

Thanks for your help!

That is a very wide slit if you are expecting to notice diffraction of light.!