The tube in a medical research X-ray unit uses platinum (Z=78) as it\'s target.
ID: 1401680 • Letter: T
Question
The tube in a medical research X-ray unit uses platinum (Z=78) as it's target.
Questions 1 and 2 are correct, I just can't seem to get the answers for 3 or 4.
1)
Use the Bohr model to estimate the minimum kinetic energy electrons must have to in order for K X-rays to just appear in the X-ray spectrum of the tube.
Ee =
eV
Your submissions:
80634.4
Computed value:
80634.4
Submitted:
Tuesday, July 28 at 2:59 PM
Feedback:
Correct!
2)
Assuming the electrons are accelerated from rest through a voltage, V, what is the minimum voltage necessary to produce the K X-rays?
V =
V
Your submissions:
80634.4
Computed value:
80634.4
Submitted:
Tuesday, July 28 at 3:23 PM
Feedback:
Correct!
3)
Assume the electrons are accelerated through the voltage calculated in part (2). What is the wavelength of the Kline?
=
nm
Your submissions:
.01463
Computed value:
.01463
Submitted:
Tuesday, July 28 at 8:39 PM
Feedback:
4)
Now assume that the electrons are accelerated through twice the voltage calculated in part (2). What is the wavelength of the K line?
=
nm
Your submissions:
.007704
Computed value:
.007704
Submitted:
Tuesday, July 28 at 3:33 PM
Explanation / Answer
(C) 1/lambda = R(Z-1)2(1-1/4)
wavelength = 1.9*10-11 m = 0.019 nm
(d) wavelength remain same.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.