What is the relationship between force in velocity selector in a bain bridge.​

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

If y gets smaller as x gets bigger and y have an relationship?

If element x has 99 protons how many electrons does it have