This scientist and Walther Ritz name a “combination principle” that generalizes an equation developed by this scientist. Serge Haroche (“ah-ROSH”) used highly excited states named for this scientist to study photons trapped in an optical cavity. Using a reduced mass term allows for a constant named for this scientist to account for finite masses. This scientist’s namesake constant is equal to the fine structure constant over 4 pi times the Bohr radius and is usually subscripted infinity. An exotic atom that could theoretically hold many atoms within it is this scientist’s namesake polaron. An equation named for this scientist is used to derive the Lyman and Balmer (10[1])spectral series for hydrogen. For 10 points, what Swedish physicist names a formula for emissions from electronic transitions in an atom? ■END■ (0[2])