Hydrogen ( 1 H 1 ), Deuterium ( 1 H 2 ), singly ionised Helium ( 2 He 4 ) + and doubly ionised lithium ( 3 Li 6 ) ++ all have one electron around the nucleus. Consider an electron transition from n = 2 to n = 1 . If the wave lengths of emitted radiation are λ 1 , λ 2 , λ 3 and λ 4 respectively then approximately which one of the following is correct ?

4 λ 1 = 2 λ 2 = 2 λ 3 = λ 4

λ 1 = 2 λ 2 = 3 λ 3 = 4 λ 4

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The Rydberg constant for an electron revolving around hydrogen atom is $R$ . The Rydberg constant for electron revolving about $10$ times ionised sodium atom will be

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Important Questions on Atomic Physics

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

When the electron in hydrogen atom jumps from fourth Bohr orbit to second Bohr orbit, one gets the

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The first member of the Balmer series of hydrogen atom has a wavelength of

6561 \overset{\circ}{A}

. The wavelength of the second member of the Balmer series (in nm) is_____________

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

In Balmer series, wavelength of first line is

λ_{1}

and in Brackett series wavelength of first line is

λ_{2}

then

\frac{λ_{1}}{λ_{2}}

EASY

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

Given the value of Rydberg constant is

10^{7} m^{- 1}

, the wave number of the last line of the Balmer series in hydrogen spectrum will be:

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The ratio of wavelengths of the last line of the Balmer series and the last line of the Lyman series is_____.

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The shortest wavelength of Paschen series in hydrogen spectrum is

8182 \overset{\circ}{A}

. The first member of the Paschen series is nearly

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

Taking the wavelength of first Balmer line in hydrogen spectrum

(n = 3

n = 2)

660 n m

, the wavelength of the

2^{n d}

Balmer line

(n = 4

n = 2)

will be :

EASY

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

Which of the series of hydrogen atom spectrum lies in the visible region of electromagnetic spectrum?

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is:

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let

λ_{n}, λ_{g}

be the de Broglie wavelength of the electron in the

n^{t h}

state and the ground state respectively. Let

\land_{n}

be the wavelength of the emitted photon in the transition from the

n^{t h}

state to the ground state. For large n, (A, B are constants)

EASY

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The series corresponding to lowest wavelength transition in

H

- atom.

EASY

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

In Balmer series for hydrogen atom, find the energy of photon corresponding to longest wavelength.

HARD

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

In hydrogen spectrum,

L_{α}

line arises due to transition of electron from the orbit

n = 3

to the orbit

n = 2

. In the spectrum of singly ionized helium, there is a line having the same wavelength as that of the

L_{α}

line of hydrogen. This is due to the transition of the electron from the orbit ______ to ________

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The energy required to ionise a hydrogen like ion in its ground state is

9

Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state?

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

Hydrogen atom in its ground state is excited by a monochromatic light of energy

13.06 eV

. The longest wavelength among the spectral lines is (Ionization energy of hydrogen atom is

13.6 eV

)

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

According to Bohr atom model, in which of the following transitions will the frequency be maximum?

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The shortest wave lengths of Paschen, Balmer and Lyman series are in the ratio

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

If the series limit frequency of the Lyman series is

V_{L},

then the series limit frequency of the Pfund series is:

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Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

The frequency for a series limit of Balmer and Paschen series respectively are

f_{1}

and

f_{3}

. If the frequency of the first line of Balmer series is

f_{2}

then the relation between

f_{1}, f_{2}

and

f_{3}

MEDIUM

Physics>Modern Physics>Atomic Physics>Emission and Absorption Spectrum

Hydrogen (₁H¹), Deuterium (₁H²), singly ionised Helium (₂He⁴)⁺ and doubly ionised lithium (₃Li⁶)⁺⁺ all have one electron around the nucleus. Consider an electron transition from

n = 2

n = 1

. If the wave lengths of emitted radiation are

λ_{1}, λ_{2}, λ_{3}

and

λ_{4}

respectively then approximately which one of the following is correct ?

The Rydberg constant for an electron revolving around hydrogen atom is R. The Rydberg constant for electron revolving about 10 times ionised sodium atom will be

Important Questions on Atomic Physics

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The Rydberg constant for an electron revolving around hydrogen atom is $R$ . The Rydberg constant for electron revolving about $10$ times ionised sodium atom will be