. A wavelength of 4.653 μm is observed in a hydrogen spectrum for a transition that ends in the nf=5 level. What was ni for the initial level of the electron?

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

How does an observation about an object differ from an inference about that object

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9