In which state does an atom emit (i) line spectrum, (ii) band spectrum ?

In which part of the electromagnetic spectrum do the spectral lines of hydrogen atom as given by Balmer series occur?

Which statement is /are correct about hydrogen spectrum?

Which of the following statements about electromagnetic spectrum is not correct?

In hydrogen atom spectrum

(i) State Pauli's exclusion principle. (ii) Of atomic theories of Rutherford and Bohr, which one can explain the line spectrum of hydrogen atom?

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)

how would you obtain the line spectrum of hydrogen?

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. 5890 Å-5896 Å (double lines of sodium)

During muscular contraction, which of the following events occur? (i)H-zone disappears (ii) A-band widens (iii) I-band reduces in width (iv) Width of A-is unaffected (v) M-line and Z-line come closer