The largest and smallest slits in these experiments are 0.16mm and 0.04mm wide, respectively. the wavelength of the laser light is 650nm. how many wavelengths wide are these slits?

Idont understand the question

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.