physics 5th important question for BSC semester

1)  Phenomenon of Compton Scattering describe? [2015 AU] Ans:- 2)  Concept of Wave-Particle Duality Explain ? [2015 AU] Ans:- ...

1)  Phenomenon of Compton Scattering describe? [2015 AU]

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2)  Concept of Wave-Particle Duality Explain ? [2015 AU]

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3)  de-Broglie wave describe ? [2015 AU]

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UNIT II

4)  Derive an expression for the radius of nth orbit for hydrogen atom ? [2015 AU]

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5)  Complementary principle of quantum mechanics Describe ? [2015 AU]

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UNIT III

6)  Bainbridge mass spectrograph Describe briefly ? [2015 AU]

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7)  Explain these series.... Paschen series, Bracket series, Pfund series. [2015 AU]

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8)  Expression for the frequency(f) of light emitted (in H-atom n1 to n2)  [2015 AU]

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9)  what is the status of Bhor's theory, after the emergence of new quantum theory of Schrodinger &        Heisenberg ? [2015 AU]

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UNIT IV

10)  Sommerfeld's relativistic atom model. [2015 AU]

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11)  Describe the fine structure of the spectral line of H-atom. [2015 AU]

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12)  explain the origin of the characteristic X-ray spectrum. [2015 AU]

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13) write the statements of Moseley's low.  [2015 AU]

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statement: the frequency of spectral line in x-ray spectrum varies as the square of atomic no of the element emitting it

14)  Diffraction of wave by crystal Explain. [2015 AU]

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15)  state Bragg's low.  [2015 AU]

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low: when a monochromatic x-ray impinge upon the atoms in a crystal lattice, each atom acts as source of scattering radiation of the same wavelength. the crystal act as a series of parallel reflecting planes. the intensity of reflecting beam will be maximum when the path difference between the two reflected wave from two different plane is a integral multiple of  λ

UNIT V

16)  Describe the beta-ray spectrum according to pauli. [2015 AU]

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17)  write an expression of mean life of radioactive sample. [2015 AU]

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18)  Describe the linear accelerator. [2015 AU]

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19)  main drawback of linear accelerator? [2015 AU]

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20)  define cosmic ray? also its origin & composition. [2015 AU]

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thank you