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What potential difference must be applied to an x-ray tube to produce x-rays with a minimum wavelength of 45.0 pm?

Sagot :

The potential difference of 2.7 x [tex]10^{4}[/tex] volts is needed.

We have an X - Ray tube to produce X - Rays.

We have to determine what potential difference to produce X-rays with a minimum wavelength of 45.0 pm ?

What is an X - Ray ?

An X - Ray is an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light.

According to the question, we have -

λ = 45 pm = 4.5 x [tex]10^{-11}[/tex] meter

h = 6.63 × [tex]10^{-34}[/tex]Js

c = 3 x [tex]10^{8}[/tex] m/s

We know -

E = hv

where v is frequency.

E = [tex]$\frac{hc}{\lambda}[/tex]

When accelerated through a potential difference of say V volts, then -

E = E(k) = eV

Therefore -

eV =  [tex]$\frac{hc}{\lambda}[/tex]

V = [tex]$\frac{hc}{e\lambda }= \frac{6.63\times 10^{-34} \times 3\times 10^{8} }{1.6\times 10^{-19} \times 4.5 \times 10^{-11} }[/tex] = 2.7 x [tex]10^{4}[/tex] volts

Hence, the potential difference of 2.7 x [tex]10^{4}[/tex] volts is needed.

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