The wavelengths and frequencies of photons in transition 1,2 and 3 for hydrogen like atom are `lambda_(1),lambda_(2),lambda_(3), v_(1),v_(2)` and `v_(3)` respectively. Then:

Hydrogen (H) , deuterium (D) , singly ionized helium (He^(+)) and doubly ionized lithium (Li) all have one electron around the nucleus. Consider n = 2 to n = 1 transition. The wavelength of emitted radiations are lambda_(1), lambda_(2), lambda_(3) and lambda_(4) respectively. then approximately

The wavelengths of photons emitted by electron transition between two similar leveis in H and He^(+) are lambda_(1) and lambda_(2) respectively. Then :-

The wavelengths of photons emitted by electron transition between two similar leveis in H and He^(+) are lambda_(1) and lambda_(2) respectively. Then :-

The wavelengths of photons emitted by electron transition between two similar leveis in H and He^(+) are lambda_(1) and lambda_(2) respectively. Then :-

The wavelengths of violet, yellow and red light are lambda_(v), lambda_(y) and lambda_(r) respectively, then …………

The wavelength of the short radio waves, microwaves, ultraviolet waves are lambda_(1),lambda_(2) and lambda_(3) , respectively, Arrange them in decreasing order.

The wavelength of the short radio waves, microwaves, ultraviolet waves are lambda_(1),lambda_(2) and lambda_(3) , respectively, Arrange them in decreasing order.

A wave enters to water from air. In air frequency, wavelength, intensity and velocity n_(1),lambda_(1),I_(1) and v_(1) respectively.In water the corresponding quantities are n_(2),lambda_(2),I_(2) and v_(2) respectively, then