What is the minimum voltage required to be applied to a Coolidge tube to generate \(X\)-rays of wavelength \(0.5~\mathring{A}?\) \((h=12.4~\text{keV-}\mathring{A}/c)\)
1. \(12.4\) kV
2. \(6.2\) kV
3. \(24.8\) kV
4. \(37.2\) kV
Subtopic:  X-Ray (OLD NCERT) |
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