Use equation 1 and the values of c and h to calculate the energy (in 10-19 J) of a 528 nm photon. (Do not include units with the answer.) Use equations 7 and 8 to determine the angle θ (in degrees) if the two positions of the first order spectral line are 36.5 cm and 63.5 cm. Assume the distance from the diffraction grating to the slit is 55 cm.