question_answer

In a certain double slit experiment arrangement, interference fringes of width 1.0 mm each are observed when light of wavelength \[5000\overset{\text{o}}{\mathop{\text{A}}}\,\]is used. Keeping the set-up unaltered if the source is replaced by another of wavelength \[6000\overset{\text{o}}{\mathop{\text{A}}}\,\], the fringe width will be (in mm)?

Answer:

1.20