What transition in the hydrogen spectrum would have the same wavelength n= 4 to n = 2 of `He^+` spectrum ?

Find the shortest wavelength of the Paschen series, given that the longest wavelength of the Balmer series in the hydrogen spectrum is 6563 A^@ .

The wavelengths of some of the spectral lines obtained in hydrogen spectrum are 9546 overset(@) (A) 6463 overset (@)(A) and 1216 overset (@)(A) . Which one of these wavelengths belongs to Lyman series?

What can we conclude from the statement that the action and absorption spectrum of photosynthesis overlap? At which wavelength do they show peaks?

Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. How fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon ?

What is the wavelength of light emitted when the electron in a hydrogen atom undergoes transition from an energy level with n= 4 to an energy level with n = 2 ?

Emission transition in the Paschen series end at orbit n = 3 and start from orbit n and can be represented as nu = 3.29 xx 10^15 (Hz) [1//3^2 - 1//n^2] Calculate the value of n if the transition is observed at 1285nm. Find the region of the spectrum.

The wavelength of light from the spectral , emission line of sodium is 589 nm. Find the kinetic energy at which, an electron would have the same de Broglie wavelength .

The wavelength of light from the spectral , emission line of sodium is 589 nm. Find the kinetic energy at which, a neutron would have the same de Broglie wavelength .

In the spectrum of hydrogen atom which transition will yield shortest wavelength?