If n=2 for `He^(+)` ion than find out the wave length

A man standing on the seashore has seen that the no of waves that hit the shore per mnute is 60. If speed of wave is 10m/s, find out the wave length.

A near U.V. photon of 300 nm is absorbed by a gas then reemitted as two photons. If the wave length of one photon is 700 nm, find out the wave length of second photon.

A near U.V. photon of 300 nm is absorbed by a gas then reemitted as two photons. If the wave length of one photon is 700 nm, find out the wave length of second photon.

[" The ratio of wave numbers associated with "],[" longest wave length of Paschen series for "Li^(2+)],[" ion to the shortest wavelength of Brackett series "],[" of H-atom would be."]

Calculate the number of waves made by a Bohr electron in one complete revolution in nth orbit of He^(+) ion, if ratio of de-Broglie wavelength associated with electron moving in n^(th) orbit and 2^(nd) orbit is 2.0 :-

Calculate the number of waves made by a Bohr electron in one complete revolution in nth orbit of He^(+) ion, if ratio of de-Broglie wavelength associated with electron moving in n^(th) orbit and 2^(nd) orbit is 2.0 :-

The electronic transition from n = 2 to n = 1 will produce shortest wave length in (where n = principle quantum state)

(a) Distinguish between transverse wave and longitudinal wave. Give one example of each type. (b) A stretched string of length I and under a tension T, emits a note of fundamental frequency n. The tension is now reduced to T/2 and the vibrating length changed so that the frequency of the second harmonic is equal to n. Find out the new length of the string in terms of its original length.

The transiton in He^(+) ion that will have the same wave number as the first line of lyman series of hydrogen will be

The transiton in He^(+) ion that will have the same wave number as the first line of lyman series of hydrogen will be