A 6.6 x10^-5 meter wide slit in an opaque screen is clarified by monochromatic light with a wavelength of 543.5 nanometres from a laser.
1) What is the angular spacing between the mainly intense maximum and the nearest minimum in the pattern of emerging light?
2) If this emerging light illuminates a screen 50 cm from the slit, what is the distance on the screen among the max and min discussed above?
3) If two narrow slits spaced by 66 μm are illuminated by this same laser, what is the angular spacing among neighbouring maxima in the emerging radiation pattern?
4) A grating with a slit or line spacing of 1.9 μm is illuminated with the laser. How many bright beams of light emerge from the grating, and what are their directions relative to the incident laser beam direction?