A Single Slit Forms a Diffraction Pattern,with the First Minimum

Multiple Choice

A single slit forms a diffraction pattern,with the first minimum at an angle of 40° from central maximum.Monochromatic light of 410 nm wavelength is used.The same slit,illuminated by a different monochromatic light source,produces a diffraction pattern with the second minimum at a 60° angle from the central maximum.The wavelength of this light,in nm,is closest to:

A) 276
B) 293
C) 309
D) 326
E) 342