How wide is the central diffraction peak on a screen 2.20 mm behind a 0.0328--wide slit illuminated by 588-nmnm light?

Explanation:

From the question we are told that

        The  distance of the screen is  

       The distance of separation of the slit is  

        The  wavelength of light is  

Generally the condition for constructive interference is

=>        

here n = 1 because we are considering the central diffraction peak

=>        

=>      

Generally the width of central diffraction peak on a screen is mathematically evaluated as

substituting values

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

i think it would be 5