Question

In a certain double slit experimental arrangement interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength 6000 Å, the fringe width will be

[CPMT 1988]

• A. 0.5 mm
• B. 1.0 mm
• C. 1.2 mm
• D. 1.5 mm

Answer 1

The correct option is C

1.2 mm