Question

The space between two parallel metal plates is filled with an element in a gaseous state. Electrons leave one plate at negligible speed and are accelerated toward the other by a potential difference ΔV\Delta V applied between the plates. As ΔV\Delta V is increased from 0, the electron current increases more or less linearly, but when ΔV\Delta V reaches 4.9 V, the current drops precipitously. From nearly 0, it builds again roughly linearly as ΔV\Delta V is increased beyond 4.9 V. (a) How can the presence of the gas explain these observations? (b) The gas emits a rather pure "light" when ΔV\Delta V exceeds 4.9 V. What is its wavelength?

Solution

Verified
Answered 1 year ago
Answered 1 year ago
Step 1
1 of 5

Electrons are accelerated between two parallel metal plates, with an element in its gaseous state between them, by a voltage ΔV\Delta V. The electron current increases almost linearly with ΔV\Delta V. But, at a certain value (ΔV=4.9  V)(\Delta V=4.9 \rm\; V), the current drops to 00, and then builds up again with the increasing voltage.

For part (a) of this question, we are asked how the gas present between the plates can explain the observations. For part (b), we are told that, beyond 4.9  V4.9 \rm\; V, the gas emits a pure light. We need to calculate the wavelength λ\lambda of this light.

Create an account to view solutions

By signing up, you accept Quizlet's Terms of Service and Privacy Policy
Continue with GoogleContinue with Facebook

Create an account to view solutions

By signing up, you accept Quizlet's Terms of Service and Privacy Policy
Continue with GoogleContinue with Facebook

Recommended textbook solutions

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics 4th Edition by Randall D. Knight

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

4th EditionISBN: 9780133942651 (8 more)Randall D. Knight
3,508 solutions
Mathematical Methods in the Physical Sciences 3rd Edition by Mary L. Boas

Mathematical Methods in the Physical Sciences

3rd EditionISBN: 9780471198260 (1 more)Mary L. Boas
3,355 solutions
Modern Physics for Scientists and Engineers 2nd Edition by Randy Harris

Modern Physics for Scientists and Engineers

2nd EditionISBN: 9780805303087 (1 more)Randy Harris
789 solutions
Fundamentals of Physics 10th Edition by David Halliday, Jearl Walker, Robert Resnick

Fundamentals of Physics

10th EditionISBN: 9781118230718David Halliday, Jearl Walker, Robert Resnick
8,950 solutions