Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-1>Q 68

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Earn 100

If the frequency of $K_{α} X - ray$ emitted from the element with atomic number $31$ is $f$ , then the frequency of $K_{α} X - ray$ emitted from the element with atomic number $51$ would be (assume that screening constant for $K_{α}$ is $1$ ) :

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Important Questions on Atomic Physics

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-1>Q 69

Which one of the following statements is wrong in the context of

X -

rays generated from a

X -

ray tube?

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-1>Q 70

50 %

of the X-ray coming from a Coolidge tube is able to pass through a

0.1 mm

thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of aluminum foil, which will allow

50 %

of the X-ray to pass through, will be

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-1>Q 71

An

X

-ray photon of wavelength

λ

and frequency

ν

collides with an initially stationary electron (but free to move) and bounces off. If

λ'

and

ν'

are, respectively, the wavelength and frequency of the scattered photon, then

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 1

An alpha nucleus of energy

\frac{1}{2} M v^{2}

bombards a heavy nucleus, distance of closet approach for the alpha nucleus will be proportional to

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 2

An $α$ -particle of energy $5 MeV$ is scattered through an angle $180 °$ by a fixed uranium nucleus. The distance of the closest approach is of the order of

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 4

The wavelengths of

K_{α} x -

rays of two metals

' A'

and

' B'

are

\frac{4}{1875 R}

and

\frac{1}{675 R}

respectively, where

R

is Rydberg's constant. The number of elements lying between

' A'

and

' B'

according to their atomic numbers is

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 5

If Bohr's theory is applicable to

{{}_{100}F m}^{257}

then radius of this atom in Bohr's unit is

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Alpha Question Bank for Medical: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 8

The attractive potential energy between electron and nucleus is given by

U = U_{0} ℓ n (\frac{r}{r_{0}}), U_{0}

and

r_{0}

are constants and

' r'

is the radius. The radius

' r'

of the nth Bohr's orbit depends upon principal quantum number

' n'

as: