here,
wavelength = 589 nm
D = 150 cm = 1.5 m
y = 4 mm
then,
ymin.gif
for m = `1
0.004 = 589*10^-9 * 1.5/d
d = 2.21*10^-4 m
d = 0.221 mm
slit spacing is 0.221 mm.
the wavelength is the spatial period of a periodic wave—the space over which the wave's form repeats. It is the space among consecutive corresponding factors of the same phase at the wave, including adjoining crests, troughs, or 0 crossings, and is a feature of each touring wave and status wave, in addition to different spatial wave patterns. The inverse of the wavelength is known as the spatial frequency.
Wavelength is generally special via way of means of the Greek letter lambda (λ). The term wavelength is likewise every so often implemented to modulated waves, and to the sinusoidal envelopes of modulated waves or waves fashioned via way of means of interference of numerous sinusoids.
learn more about wavelength here; https://brainly.com/question/10728818
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