Chemistry and physics are so closely related that sometimes the fields overlap. Which of the following experiments might both chemists and physicists do?

A. Study the life cycle of a month.
B. Study how well a pesticide works on plants.
C. Study what kind of chemicals enter milk.
D. Study how the Suns hates affects pollution.

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?