A difference of 2 . 3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom makes a transition from the upper level to the lower level?

The Separation of two energy levels in an atom, E = 2 . 3 eV = 2 . 3 × 1 . 6 × 10 - 19 = 3 . 68 × 10 - 19 J The relation between energy and frequency is given by, E = h v Where, Planck’s constant h = 6 . 62 × 10 - 34 Js , and, ν is the frequency of radiation. ∴ ν = E ⁄ h = 3 . 68 × 10 - 19 6 . 62 × 10 - 34 = 5 . 55 × 10 14 Hz The radiation frequency is 5 . 6 × 10 14 Hz . Here, the symbols have their usual meaning.

E M B I B E

Intermediate Second Year Physics>Chapter 13 - Atoms>MODEL QUESTIONS (IPE PATTERN)>Q 14

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12th Andhra Pradesh Board

IMPORTANT

Earn 100

Give two drawbacks of Rutherford's atomic model.

Important Questions on Atoms

HARD

12th Andhra Pradesh Board

IMPORTANT

Intermediate Second Year Physics>Chapter 13 - Atoms>MODEL QUESTIONS (IPE PATTERN)>Q 1

What is impact parameter and angle of scattering? How are they related to each other?

HARD

12th Andhra Pradesh Board

IMPORTANT

Intermediate Second Year Physics>Chapter 13 - Atoms>MODEL QUESTIONS (IPE PATTERN)>Q 2

Derive an expression for potential and kinetic energy of an electron in any orbit of a hydrogen atom according to Bohr's atomic model. How does P.E change with increasing n?

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12th Andhra Pradesh Board

IMPORTANT

Intermediate Second Year Physics>Chapter 13 - Atoms>MODEL QUESTIONS (IPE PATTERN)>Q 3

What are the limitations of Bohr's theory of hydrogen atom?

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12th Andhra Pradesh Board

IMPORTANT

Intermediate Second Year Physics>Chapter 13 - Atoms>MODEL QUESTIONS (IPE PATTERN)>Q 4

Explain the distance of closest approach and impact parameter.

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12th Andhra Pradesh Board