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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsX-raysMedium2 minQB

PhysicsMediummultiple choice

In the Coolidge tube experiment, the short wavelength limit of the continuous X-ray spectrum is equal to 66.3 pm

Options:(select one or more)

Answer:

B, C

Solution:

$λ_{min} = 66.3 pm = 0.663 \overset{˚}{A}$ .

$V = \frac{12400}{0.663} \approx 18.7 kV \approx 18.75 kV, so (B) . λ_{d B} = \frac{h}{2 m e V} = \frac{12.27}{18.75 \times 1 0 ^{3}} \overset{˚}{A} \approx 0.09 \overset{˚}{A} \approx 9 pm, of the order of 10 pm, so (C).$

Subject:PhysicsTopic:Modern PhysicsSubtopic:X-rays

⏱ 2mℹ️ Source: QB

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