Physics

Problem

A double-slit experiment initially uses light of wavelength

500\,\text{nm}

, a slit separation of

0.30\,\text{mm}

, and a screen distance of

1.5\,\text{m}

. If the slit separation is increased to

0.40\,\text{mm}

while all other parameters stay the same, the new fringe spacing on the screen will a) increase by

33\%

. b) decrease by

25\%

. c) decrease by

33\%

. d) decrease by

44\%