Diffraction and Interference

1: single slit
w = 20 μm

2: two slits
w = 20 μm, determine d

3: single hair
determine w

2: four slits
w = 20 μm, determine d

wavelength λ = 0.633 μm

breadboard: 1 unit = 2.5 cm

notation:
w = slit width
d = slit spacing