An electron moves from the 4th energy level to the 2nd energy level in a hydrogen atom. The wavelength of the photon emitted is 486 nm. What is the energy, in Joules, of this photon? (Report your answer in scientific notation. Round the coefficient to 2 significant figures.)

You would do 1500/4 and the answer is 375

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy