Which will give wider-spaced fringes in a double-split experiment, red light or violet light?

red light

Which will give wider-spaced fringes in a double-split experiment, red light or violet light?
why would you give best answer to someone who obviously took the answer from the other answerers and didn't even explain themselves?..wow Report It

Reply:The formula is:


W*sin(theta) = (m)(wavelength)


Red light has a higher wavelength than violet light.


Looking at the equation, if wavelength increases, W must also increase, assuming everything else is constant.


Therefore, red light would give wider-spaced fringes.
Reply:fringe width (x-bar) = n D λ /d


D = screen distance, d=slit separation, n = order of maxima,


----------------------


(x-bar) = proportional to = [λ] %26gt; the wavelength


and


λ(red) [780 nm] %26gt; λ(vio) [380 nm]


so


x-bar (red) fringes will be wider-spaced