Jack Ord- Physics Example Programs
Old hands may remember Jack Ord- Physics prof. at Waterloo Uni in Canada. He produced some lovely code for demonstrations to students. Sadly he died about 2 years ago, and his website has been closed.
Courtesy of the Wayback Machine I've a collection of most of his work. It is not that easy to find via that site, and I don't know a way to download the whole relevant section that holds his work.'wget' doesn't seem to work in these circumstances.
I've harvested a lot of Jack's code- mostly the ones that interest me! The Wayback machine has got me the pages for most, but they do not recreate a remote copy of the site- rather any links go back to the WBM's copy of the page, being direct not relative references. Also, Jack made many revisions through the years, and moved to Postscript and JAVA and BBC BASIC. You can always go to the Wayback copies to see in a more helpful way. archive of Jack's work.
I've put up this site, because people with a science/maths background could learn a lot from his code. It seems a fitting tribute to preserve at least some of his work.
Below is a list of LB code for various Physics situations. Available as a zip file.
Added the pages of description. Don't expect the internal links to work- and I haven't included the diagrams so they'll show as empty. Contact me if you want to see the formulae, particularly!! zip file of texts
NB Most of the LB programs need a 'scan' adding, and change to a subroutine to exit.
NB The BBC code is runnable in the free ( and excellent) BBC BASIC, on all plaatforms.
Could easily convert to LB
Jack coded in LB, Java and Postscript!! ( But not always all three)
bench.bas central forceorbits -changed 'loop' to 'luup' since reserved word
bplot.bas magnetic field of coil
cofm.bas two particles orbit centre of mass
df1lib.bas diffraction by array
df2lib.bas diffraction thru' circular aperture
df3lib.bas diffraction through square and triangle apertures
df4lib.bas diffraction through 1, 3, 5 slits
df5bbc.bas BBC
df6bbc.bas BBC
fbowl.bas particles sliding in bowl with friction
fcomb.bas motion of 2 or three bodies round Centre of Mass
felect.bas electrons moving in cylindrically symmetrical field
felelib.bas
feytab.bas mass-on-a-spring by Feynman method -as a table.
fgolf.bas golf ball with wind and friction. Problem?
fgun.bas cannon with air friction, altitude dependent
fhomer.bas cannon
forbit.bas projectile launched from North Pole
fosalib.bas masses hanging from springs one below the other
fosbb.bas masses hanging from springs one below the other
foscb.bas BBC
fosdb.bas BBC
fplt.bas compare Euler and Feynman algorithm graphs with analytical solution
fpltb.bas BBC
frdslib.bas two rods are attracted by mutual gravity
fscat.bas Rutherford alpha scattering
fsprb.bas BBC Mass on a spring
fspring.bas Mass on s spring
ftabb.bas BBC Mass on a spring
ftjnlib.bas Trojan point- 3 body problem
fudpb.bas BBC Ball thrown up at terminal velocity
fudps.bas Ball thrown up at terminal velocity
gc1lib.bas Magnetic field round three current carrying wires
gc2lib.bas Magnetic firld through current-carring loop
gc3lib.bas magnetic fieldlines in the x-y plane due to
' (1) a current-carrying loop centered in the x-z plane
' (2) a north/south pole pair centered on the y-axis
gcpot.bas Potential plot for equilateral mass array
gd1lib.bas solution of Laplace's equation
gd2lib.bas Laplace's equation for concentric square prisms sides L and 2L
gplot.bas fieldlines and equipotentials for an equilateral mass array
h1alib.bas path for fastest route between fixed points in a uniform gravitational field
h1blib.bas hanging chain (n mass points on an n+1 segment string)
h1clib.bas catenary?? ?Problem with code?
h2alib.bas trapezoid and "vbar" integration algorithms for mass-spring system
h3alib.bas bouncing ball
h3blib.bas period of a pendulum with 90 degree amplitude
h5alib.bas Harmonic Oscillator and Bouncing Ball Eigenvalues 'end if' added
h5blib.bas Bouncing Ball Probability Density
h5clib.bas the two lowest energy states of a double well (an infinite square well with a central barrier)
h6alib.bas Central Force Motion: apsidal angle integral
h7alib.bas Schrodinger equation for the hydrogen atom:
h8abbc.bas BBC
mdipole.bas magnetic fieldlines in the x-y plane due to (1) a current-carrying loop centered in the x-z plane (2) a north/south pole pair centered on the y-axis
mplot.bas magnetic field lines about parallel wires carrying currents -I, 2I, and -I
nm1lib.bas Plucked string. Wave superposition
nm2lib.bas motion of 8-segment string clamped at both ends
nm3lib.bas Plucked string
nm4lib.bas Plucked string
nm5lib.bas Pulse on string
nm6lib.bas FFSS coefficients for Pulse A and Pulse B on a n-segment string clamped at both ends
nm7lib.bas wave pulse incident on a variable thickness segment where the mass density
' increases by a factor of 1.44 followed by a region where the mass density
' increases again by a factor of 1.44
qm1bbc.bas BBC quantum wave in a square well
qm2bbc.bas BBC quantum wave
qm3bbc.bas BBC quantum wave (Pulse B) incident on a variable thickness region
qm4bbc.bas BBC superposition of the two lowest energy states of a double well
qm5b.bas BBC Quantum Harmonic Oscillator
qplot.bas fieldlines and equipotentials for an equilateral -Q, +2Q, -Q array