What is Balmer series? To which part of the electromagnetic spectrum does it belong to ? 

Which part of electromagnetic spectrum does Balmer series belong ?

The Vividh Bharati station of All India Radio , Delhi , broadcasts on a frequency of 1,368 kHz (kilo hertz) . Calculate the wavelength of the electromagnetic radiation emitted by transitter . Which part of the electromagnetic spectrum does it belong to ?

The vividh bharati station of All India Radio, Delhi broadcasts on a frequency of 1.368 kHz. Calculate the wave length of the electromagnetic radiation emitted by the transmitter. Which part of the electromagnetic spectrum does it belong ?

An electromagnetic radiation has an energy 14.4keV. To which region of the electromagnetic spectrum it belongs?

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs. 21 cm (wavelength emitted by atomic hydrogen in interstellar space).

Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs. 2.7 K (temperature associated with the isotropic radiation filling all space-thought to be a relic of the 'big-bang' origin of the universe].