Hard X-rays produced from a Coolidge tube are | vedclass

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(D) The hardness of $X$-rays (their penetrating power) is determined by the energy of the incident electrons. Since the kinetic energy of the electron

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Potential difference between the cathode and the target

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(D) The hardness of $X$-rays (their penetrating power) is determined by the energy of the incident electrons. Since the kinetic energy of the electrons is given by $K.E. = eV$,where $V$ is the potential difference between the cathode and the target,increasing the potential difference increases the energy of the electrons,resulting in harder $X$-rays with shorter wavelengths.

Hard $X$-rays produced from a Coolidge tube are due to .........

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Assertion : Soft and hard $X-$ rays differ in frequency as well as velocity.
Reason : The penetrating power of hard $X-$ rays is more than the penetrating power of soft $X-$ rays.

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