THE OPERATION OF A CATHODE RAY TUBE
OBJECT: To acquaint the student with the operation of a cathode ray tube, and to study the
effect of varying potential differences on accelerated electrons.
THEORY: A heater coil in the back of the CRT, when supplied wi
General Chemistry:
An Integrated Approach
Hill, Petrucci, 4th Edition
Chapter 1
Chemistry:
Matter and Measurement
Chemistry: Principles and
Applications
Chemical theory and applications are interwoven
like the threads of a fine fabric.
Chlorine gas is an
University of Memphis * Department of Physics
Phys-2020 section 01: Midterm Examination #3 (SOLUTION KEY)
30 November 2012
Grading:
each correct answer is worth 1 point, each wrong answer is 0 points. The test total,
i.e., 100%, equals 20 points. There ar
University of Memphis * Department of Physics
Phys-2020 section 02: Midterm Examination #3 (SOLUTION KEY)
29 November 2012
Grading:
each correct answer is worth 1 point, each wrong answer is 0 points. The test total,
i.e., 100%, equals 20 points. There ar
University of Memphis * Department of Physics
Phys-2020 section 02: Solution Key to Midterm Examination #2
30 October 2012
Grading:
each correct answer is worth 1 point, each wrong answer is 0 points. The test total,
i.e., 100%, equals 20 points.
Use the
University of Memphis * Department of Physics
Phys-2020 section 01: Solution Key to Midterm Examination #2
29 October 2012
Grading:
each correct answer is worth 1 point, each wrong answer is 0 points. The test total,
i.e., 100%, equals 20 points.
Use the
1) Find the critical angle for 589-nm light in the following materials if they are
surrounded by air: (a) diamond (n = 2.419), (b) fused quartz (n = 1.458), and
(c) ice (n = 1.309).
2) A small light fixture at the bottom of a fountain is 50 centimeters be
1) The following frequencies are for different types of electromagnetic radiation.
Find the free-space wavelengths and the types of radiation. (a) 100 MHz (b)
480 THz (b) 2 GHz (d) 2x1020 Hz
2) A typical He-Ne laser emits 10 mW of power in a red beam with
1) He-Ne laser light (632.8 nm wavelength) is sent through a 0.3-mm wide slit.
How wide is the central diffraction peak on a screen that is 1 meter from the
slit?
2) A screen is placed 50 cm from a single slit. Light at 690 nm is sent through the
slit and
1)
A certain projector uses a single positive lens. An object that is 24 mm tall is to
have its image projected onto a 1.8-meter tall screen so that the image fills the
screen. The distance between the screen and the object is 3 meters. (a) Find the
focal
1) Linear-polarized light hits a single polarizer with its electric field parallel to the
polarizers transmission axis. Through what angle should the polarizer be
rotated so that the intensity is reduced by a factor of (a) 3, (b) 5, and (c) 10?
2) The cri
1) X-rays with a wavelength of 120 pm are used in a Compton scattering
experiment. (a) Find the wavelengths of the x-rays scattered at angles of 30,
90, 150, and 180. (b) Find the energy of the scattered electron in each case.
(c) Which of these angles re
1) Two jets of particles are ejected from the center of a radio galaxy in opposite
directions. Both jets move at 0.75c relative to the galaxy. Determine the speed
of one jet relative to the other one.
2) A Klingon spacecraft moves away from Earth at 0.80c
1) A radioactive sample contains 1015 atoms and has an activity of 6x1011 Bq.
What is its half-life?
2) A radioactive sample is prepared with an initial activity of 10 mCi. Four hours
later, its activity is 8 mCi. (a) Find the decay constant and half-life
1) How many sets of quantum numbers are possible for a hydrogen atom for
which (a) n=1 and (b) n=3? Do this by listing all possible sets. Do your
answers agree with the rule that there are 2n2 states for a shell with quantum
number n?
2) The carbon dioxid
1)
A double slit pattern is formed on a wall that is 2 m from the slits with 589-nm
light. The tenth interference minimum appears 7.26 mm from the central
maximum. Find the spacing of the slits.
2)
Two parallel slits are separated by 0.25 mm and illuminat
(Optical Fiber)
A typical optical fiber has a
cylindrical core with an index of refraction of 1.62 wrapped by a cladding jacket
whose index of refraction is 1.52. The diameter of the core is 50 m (microns).
Light traveling in air is launched into one end
(Compound Microscope)
Design a compound microscope with a total magnifying power of 500x. The
distance between the objective and eyepiece lenses must be between 12 cm and 16
cm.
Tell me your design by specifying the following quantities:
total magnificati
(Designing Lenses II)
A lens with an index of refraction of 1.61 has a front surface with an radius of
curvature of 14 cm.
(a) Find the radius of curvature of the second surface if the lens is to act as a
positive lens with a focal length of 12 cm. Sketch
. (Apparent Depth and Paraxial/Nonparaxial Rays)
A fish is resting one meter below the surface in a pool of water (n = 1.33). Find the
depth of the fishs image below the surface if the image is viewed with rays that
strike the water-air interface at an an
(Blackbody Radiation & You)
You are sitting in your room doing physics homework. Your skin temperature is
95F (a typical skin temperature). Let's say that your skin surface area is 12000
cm2 and that you radiate as a perfect blackbody.
(a) At what wavelen
Antireflection Coatings)
Magnesium fluoride (n = 1.38) is often used as an antireflecting coating on lenses.
Find the minimum thickness necessary to use on a glass lens with n = 1.5 so that
the loss of light due to reflection is minimized. Since white lig
(Isotopes of Hydrogen)
The three isotopes of hydrogen are commonly called hydrogen (1H), deuterium
(2H), and tritium (3H). Hydrogen and deuterium are stable while tritium decays via
- emission with a half-life of 12.33 years.
(a) Find the binding energies
(Special Relativity Meets The Original Star Trek)
Captain Kirk leaves the Enterprise in a shuttlecraft and speeds away at 0.7c relative
to the Enterprise. Mr. Spock, back on board the Enterprise, monitors the
shuttlecraft with the ship's sensors.
(a) Kirk
(Bohr Model of Hydrogen)
Consider a Hydrogen atom in the ground state. Using Bohr's model, answer the
following questions.
(a) What is the minimum amount of energy necessary to ionize the atom (i.e. to
remove the electron from the atom)?
(b) What waveleng
(Relativistic Energy & Momentum)
An electron is accelerated from rest to a speed where its total energy is equal to
twice its rest energy.
(a) How much energy did it take to do this?
(b) How fast is the electron traveling?
(c) Find the momentum of the ele
1.1 Dimensional Analysis/Units
1) A rectangular garden is 25 feet by 100 feet. Find the area of the lot in square
meters.
2) It takes 2 minutes to fill a 10-gallon gas tank.
a) Find the fill rate in gallons per second.
b) Find the fill rate in cubic meter
2.1 Two-Dimensional Translational Motion
1)
In a local pub, a customer slides an empty beer mug down the bar counter for a
refill. The bartender is distracted and doesnt see the mug, which slides off the
counter and strikes the floor a distance d from the
1) A force applied to an object of mass m1 gives it an acceleration of 3 m/s2. The
same force applied to an object of mass m2 gives it an acceleration of 2 m/s2.
a) Find the ratio of the masses.
b) If the two masses are combined and acted upon by the same