Fringe width (for dark and bright bands):
D * wavelength / d
where, D = distance between screen and coherent sources (metres),
wavelength = wavelength of light used is experiment (nanometres),
d = distance between the 2 coherent sources (millimetres).
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volume = length*height*width Rearrange the formula: length = volume/height*width
It depends how tall it is =)
Length = (Perimeter - twice width) / 2
i am sorry but i forget i think it is length times width?
the formula for the volume of a cuboid is quite simple,it is length multiply by width multiply by height.That's all.