When electrons from higher energy state come back to lower energy state.

During electric discharge at low pressure.

When cathode rays are reflected from the target.

When electrons from higher energy state come back to lower energy state.

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$X$ -rays are produced

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Important Questions on Atomic Physics

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Physics>Modern Physics>Atomic Physics>X - Rays

Which of the following wavelengths falls in

X

-ray region?

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Physics>Modern Physics>Atomic Physics>X - Rays

X-rays consists of

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Physics>Modern Physics>Atomic Physics>X - Rays

What are cathode rays?

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Physics>Modern Physics>Atomic Physics>X - Rays

The shortest wavelength of

X

-rays emitted from an

X

-ray tube depends upon

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Physics>Modern Physics>Atomic Physics>X - Rays

W. K. Roentgen discovered

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Physics>Modern Physics>Atomic Physics>X - Rays

Which wave or ray is produced due to decelerating or accelerating charged particles?

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Physics>Modern Physics>Atomic Physics>X - Rays

For the structural analysis of crystals,

X -

rays are used because:

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Physics>Modern Physics>Atomic Physics>X - Rays

The potential difference applied to an X - ray tube is 5 kV and the current through it is 3.2 mA. The number of electrons striking the target per second is .............. (Take

e = 1.6 \times 10^{- 19} C

)

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Physics>Modern Physics>Atomic Physics>X - Rays

X - ray

tube is operated at

66 kV .

Then, in the continuous spectrum of the emitted

X - rays

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Physics>Modern Physics>Atomic Physics>X - Rays

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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Physics>Modern Physics>Atomic Physics>X - Rays

The voltage applied to the Coolidge

X

-ray tube is increased by

25 %

. As a result, the short wave limit of continuous

X

-ray spectrum shifts by

Δ λ

. The initial voltage applied to the tube is

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Physics>Modern Physics>Atomic Physics>X - Rays

An X-ray tube produces a continuous spectrum of radiation with its shortest wavelength of

45 \times 10^{- 2} Å

. The maximum energy of a photon in the radiation in

eV

(h = 6.62 \times 10^{- 34} J s, c = 3 \times 10^{8} {m s}^{- 1})

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Physics>Modern Physics>Atomic Physics>X - Rays

The X-ray beam coming from an X-ray tube will be

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Physics>Modern Physics>Atomic Physics>X - Rays

The wavelengths of

K_{a}

x

-rays of two metals

‘ A ’

and

‘ B ’

are

\frac{4}{1875 R}

and

\frac{1}{675 R}

respectively, where

‘ R ’

is rydberg constant. The number of elements lying between

‘ A ’

and

‘ B ’

according to their atomic numbers is________

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Physics>Modern Physics>Atomic Physics>X - Rays

The

k

-line of singly ionized calcium has a wavelength of

393.3 nm

as measured on earth. In the spectrum of one of the observed galaxies, this spectral line is located at

401.8 nm

. The speed with which the galaxy is moving away from us, will be

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Physics>Modern Physics>Atomic Physics>X - Rays

In a discharge tube when

200 volt

potential difference is applied

6.25 \times 10^{18}

electrons move from cathode to anode and

3.125 \times 10^{18}

singly charged positive ions move from anode to cathode in one second. Then the power of tube is:

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Physics>Modern Physics>Atomic Physics>X - Rays

The energy of a photon of a characteristic X-ray from a Coolidge tube comes from

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Physics>Modern Physics>Atomic Physics>X - Rays

Which of the following results is correct, if the potential difference between the anode and cathode of the $X$ -ray tube increases ?

Question Image

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Physics>Modern Physics>Atomic Physics>X - Rays

The filament current in the electron gun of a coolidge tube is increased while the potential difference used to accelerate the electrons is decreased. As a result, in the emitted radiation

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Physics>Modern Physics>Atomic Physics>X - Rays

Consider a photon of continuous X-ray coming from a Coolidge tube. Energy of photon comes from

X-rays are produced

Important Questions on Atomic Physics

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$X$ -rays are produced