Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- X-rays
Concepts Of Physics MCQ Edition [Volume 2] · Physics · X-rays
Calculate the cutoff wavelength of the continuous X-rays produced...
Calculate the cutoff wavelength of the continuous X-rays produced by an X-ray tube operating at .
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
The cutoff wavelength of continuous X-rays is given by the Duane-Hunt law:
\lambda_{\text\min} = \dfrac{hc}{eV}
Substituting the standard value and :
\lambda_{\text\min} = \dfrac{1242 \text{ eV}\cdot\text{nm}}{30000 \text{ eV}}
\lambda_{\text\min} = 0.0414 \text{ nm}
Since :
\lambda_{\text\min} = 41.4 \text{ pm}
\lambda_{\text\min} = \dfrac{hc}{eV}
Substituting the standard value and :
\lambda_{\text\min} = \dfrac{1242 \text{ eV}\cdot\text{nm}}{30000 \text{ eV}}
\lambda_{\text\min} = 0.0414 \text{ nm}
Since :
\lambda_{\text\min} = 41.4 \text{ pm}