for each of the following electromagnetic radiation sources,
tabulate the frequency (Hz), the wavenumber, the energy (eV), and
the region of the electromagnetic spectrum (IR, vis, etc.)
a. frequency doubled Nd:YAG laser at 532nm
b. CO2 laser at 10.6 micrometers
c. klystron at 1.23 cm
d. Cu K(alpha) emission at 154.1 pm
e. oscillator used in NMR at 1.5m
An electromagnatic wave is traveling in vacuum with frequency
6.5 x 1014 Hz. The wave has average total energy density
of 4.6 x 10-6 J/m3.
(a) What is the speed of this wave?
(b) What is the wavelength of this wave?
(c) What is the maximum electric field of this wave?
(d) What is the rms magnetic field of this wave?
(e) How much energy does a 2 m2 flat surface
(perpendicular to the wave propagation direction) receive in 8...
A light source emitting radiation at 7.00∙1014 Hz is just
capable of ejecting photoelectrons from Eiteneerium (Ei).
A. What can be done with the light to produce no photoelectrons?
Explain conceptually in one sentence.
B. What is the effect of increasing intensity of this light?
C. What is the work function of Eiteneerium?
D. If the frequency of light is now doubled, what is the speed
of the emitted electrons?
A) Arrange the following in order of increasing energy:
a) 9.9 x 1014 Hz
b) 255 nm
c) 410 kJ/mol
B) A metal has a work function of 385 kJ/mol. Which of the above
photons could eject an electron from this metal? Why?
Atubeisopenonlyatoneend.Acertainharmonicproducedby the tube has
a frequency of 450 Hz. The next higher harmonic has a frequency of
750 Hz. The speed of sound in air is 343 m /s. (a) What is the
integer n that describes the harmonic whose frequency is 450 Hz?
(b) What is the length of the tube?
A series RCL circuit has a resonant frequency of 1470 Hz. When
operating at a frequency other than 1470 Hz, the circuit has a
capacitive reactance of 5.0 Ω and an inductive reactance of 26.0
Ω.
(a) What is the value of L?
(b) What is the value of C?
A series RCL circuit has a resonant frequency
of 1470 Hz. When operating at a frequency
other than 1470 Hz, the circuit has a
capacitive reactance of 5.0 ?
and an inductive reactance of 25.0 ?.
(a) What is the value
of L?
(b) What is the value
of C?
Me and a friend have been trying to
figure this out for a while. I know I have the XL = 2*pi*f*L
formula.
Any help would be appreciated
(particularly if...
In music, middle C has a frequency of about 256 Hz - the precise
frequency depends on the tuning scheme. How does the wavelength of
a middle C note propagating through air compare to the size of a
typical human body? How does the wavelength of the same note
propagating through water compare to the human body? What frequency
of sound in air has a wavelength nearly the size of a human head?
This size is important because we have...
1. Diatomic nitrogen's oscillation frequency is about 6.2 x
1013 Hz. What is the spacing between excited vibration
energy states of nitrogen? Give your answer in eV.
1a. What is the zero-point energy of the vibration mode of
diatomic nitrogen if its oscillation frequency is 6.2 x
1013 Hz? Give your answer in eV.
1c. Per the equipartition theorem in thermodynamics, each degree
of freedom of a system has (on average) of energy. Vibration modes
of molecules like nitrogen do...