The laser pointer emits light because electrons in the material are excited (by a battery) from their ground state to an upper excited state. when the electrons return to the ground state, they lose the excess energy in the form of 537-nm photons. what is the energy gap between the ground state and excited state in the laser material?

(science)study the following ocean currents map. an ocean currents map is shown. on the map the locations for san diego, california and savannah, georgia are marked. there is a looping current from the north past san diego and a looping current from the south near savannah which statement is most likely correct about the average temperatures in san diego, california as compared to savannah, georgia? it is higher in savannah because of the cool ocean currents from the south. it is higher in savannah because of the warm ocean currents from the north. it is lower in san diego because of the warm ocean currents from the south. it is lower in san diego because of the cool ocean currents from the north.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical