Consider three points charges located at the corners of a right angle triangle where q=q=5 micro columbs, q=-2 micro columbs with distance q2 and q3 is 0.5. find the resultant force

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?