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Hydrogen atoms are excited on n=4 state....

Hydrogen atoms are excited on n=4 state. In the spectrum of emitted radiation, number of lines in the unltraviolet and visible regions are respectively-

A

`2:3`

B

`3:1`

C

`1:3`

D

`3:2`

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • The electron in a hydrogen atom has been excited to the n -th state. What is the maximum number of spectral lines that may be emitted by the atom when the electron transits to the ground state ?

    A
    `1/6 n(n-1)(n-2)`
    B
    n
    C
    n(n-1)
    D
    `1/2n(n-1)`

  • The wave number of the first line in the Lyman series in hydrogen spectrum is

    A
    72755.5 `cm^(-1)`
    B
    109678 `cm^(-1)`
    C
    82258.5 `cm^(-1)`
    D
    65473.6`cm^(-1)`

  • Hydrogen atom in ground state is excited by a monochromatic radiation of lambda=975"Å" . Number of spectral lines in the resulting spectrum emitted will be

    A
    3
    B
    2
    C
    6
    D
    10

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    If the electron in a hydrogen atom jumps from the second excited state to its ground state, the wavelength of the emitted radiation becomes 1026 Å . Determine the value of Rydberg constant from this data.

    Explain why the spectrum of hydrogen contains a number of lines although a hydrogen atom has only one electron.

    (1) What is meant by line spectra of atom ? (2) How many lines are observed in the visible region of hydrogen spectrum?

    Hydrogen atoms in the ground state are excited by means of radiation of wavelength 1026 Å. Find out the wavelength of radiation that this excited atoms can emit when they come back to ground state. Given, h=6.625xx10^(-34)J*s,c=3xx10^(8)m*s^(-1), 1 eV =1.6xx10^(-19)J ionisation energy of hydrogen = 13.62 eV.

    Electromagnetic waves are emitted from an atom in excited state and gamma -rays are emitted during radioactive disintegration. What are the similarities and dissimilarities between them ?

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