Rank the following electron transitions in the hydrogen atom according to the wavelength of light needed to make the transition. the smallest wavelength at the top to the largest at the bottom. (a) level 1 to level 2 (b) level 1 to level 3 (c) level 1 to level 4 (d) level 1 to level 5

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c