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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsX-raysMedium2 minQB

PhysicsMediumsingle choice

When a beam of accelerated electrons hits a target, which one of the following wavelengths is absent in the X-ray region of the spectrum, if the tube is operated at 40000 V?

Options:

Answer:

Solution:

$λ_{cutoff} = \frac{h c}{e V} = \frac{12400}{40000} = 0.31 \overset{˚}{A}$ Wavelengths less than $0.31 \overset{˚}{A}$ will be absent, so $0.25 \overset{˚}{A}$ is absent.

Subject:PhysicsTopic:Modern PhysicsSubtopic:X-rays

⏱ 2mℹ️ Source: QB

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