First slide

X-rays

Question

The shortest wavelength produced in an X-ray tube operating at 0.5 million volt is

Moderate

A

dependent on the target element
B

about $2.5 \times 10^{- 12} m$
C

double of the shortest wavelength produced at 1 million volt
D

dependent only on the target material

Solution

$λ_{min} = \frac{h c}{e V_{max}}$
$As, λ_{min} \propto \frac{1}{V_{max}}$
So, the shortest wavelength produced in an X-ray tube operating at 0.5 million V is double of the shortest wavelength at 1.0 million V.

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