Which of the following represents the greatest energy transition from a higher energy level to a lower one? emission of a blue photon of 450 nm emission of a red photon of 770 nm emission of a green photon of 550 nm emission of a yellow photon of 590 nm

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]