Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 189

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IMPORTANT

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Hydrogen atom does not emit $X$ -rays, because

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Important Questions on Modern Physics

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IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 190

The

X

-ray beam coming from an

X

-ray tube will be:

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 191

Consider the following two statements

A

and

B

and identify the correct choice in the given answer.
(

A

) The characteristic

X

-ray spectrum depends on the nature of the material of the target.
(

B

) The short wavelength limit of continuous

X

-ray spectrum varies inversely on the potential difference applied to the

X

-ray tube.

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 192

For production of characteristic

K_{β}

X

-rays, the electron transition is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 193

The kinetic energy of electrons that strike the target is increased, then the cut-off wavelength of continuous

X

-ray spectrum

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 194

The wavelength of

K_{α}

,

X

-rays for lead isotopes

{Pb}^{208}, {Pb}^{206}, {Pb}^{204}

are

λ_{1}, λ_{2}

and

λ_{3}

respectively. Then

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 195

The

K_{α}

and

K_{β}

lines of characteristic

X

-ray spectrum of molybdenum are

0.76 Å

and

0.64 Å

respectively. The wavelength of

L_{α}

line is

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 196

Consider a photon of continuous

X

-ray coming from a coolidge tube. Its energy comes from

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Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 9 - Modern Physics>Objective Problems [Level 1]>Q 197

If the potential difference applied to the tube is doubled and the separation between the filament and the target is also doubled, the cut-off wavelength will