Concept explainers
(a)
The shortest and longest wavelengths of the Brackett series
Answer to Problem 100QAP
The shortest and longest wavelengths of the Brackett series are
Explanation of Solution
Given:
For Brackett series
Formula used:
Rydberg formula is given as
Calculation:
For the shortest wavelength of the Brackett series
Putting these values in Eq. (1.1) we get
This emission is in the infrared range.
For the longest wavelength
This emission is also in the infrared range.
Conclusion:
Therefore, the shortest and longest wavelengths of the Brackett series are
(b)
The shortest and longest wavelengths of the Pfund series
Answer to Problem 100QAP
Therefore, the shortest and longest wavelengths of the Pfund series are
Explanation of Solution
Given:
For Pfund series
Calculation:
For the shortest wavelength of the Pfund series
Putting these values in Eq. (1.1) we get
This emission is in the infrared range.
For the longest wavelength
This emission is also in the infrared range.
Conclusion:
Therefore, the shortest and longest wavelengths of the Pfund series are
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Chapter 26 Solutions
COLLEGE PHYSICS-ACHIEVE AC (1-TERM)
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- Suppose the velocity of an electron in an atom is known to an accuracy of 2.0103 m/s (reasonably accurate compared with orbital velocities). What is the electron's minimum uncertainty in position, and how does this compare with the approximate 0.1-nm size of the atom?arrow_forwardWhat is the kinetic energy of an electron in a TEM having a 0.0100-nm wavelength?arrow_forwardGive an example of a physical entity that is quantized. State specifically what the entity is and what the limits are on its values.arrow_forward
- If electron is to be diffracted significantly by a crystal, its wavelength must be about equal to the spacing, d, of crystalline planes. Assuming d=0.250 nm, estimate the potential difference through which an electron must be accelerated from rest if it is to be diffracted by these planes.arrow_forwardWhich aspects of the photoelectric effect cannot be explained without photons? Which can be explained without photons? Are the latter inconsistent with the existence of photons?arrow_forwardGive an example of a physical entity that is not quantized, in that it is continuous and may have a continuous range of values.arrow_forward
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