Subjects: Physics

Topics include generation of photons of light; photons polarized/polarized at right angles; conductors reflect and insulators transmit; velocity and polarization in a crystal; Polaroid film, how it works; polarization by partial reflection; polarization of sky, haze, milk in water; between crossed polaroids, sugar, cellophane, tooth, plastic under stress, LCD, puzzles.

IIf the movement of a particle causes delayed movement in its neighbor we have a wave. Incorporating new graphics this updated video shows: transverse waves, tension waves such as ripples, gravity waves, longitudinal or push waves, shear and torsional waves; characteristics, amplitude, freq. vel. Period; V = nL is demystified with a passing train; velocity, refraction, reflection, superposition, diffraction interference and standing waves.

Radioisotopes have an important role in society today. The ability of radiation to pass through matter allows radioisotopes to be applied in many different ways. This video examines the use of radioisotopes in medicine (diagnosis, radiotherapy) and industry (e.g. materials testing). Radioisotope manufacture is described and radiation safety is discussed in different contexts.

Topics include PE and KE- roller coasters, trapeze, slides; W=F x Dist – falls into the safety net; vectors – tightrope walkers & cable cars; components of motion- resolving the complex motion in rides, SHM; trajectory – human cannon ball; angular acceleration – merry go rounds, loop the loop, banking; angular momentum – tumblers; pendulum – trapeze artists, swings.

Topics include relative motion; projectiles from standing and moving launch sites; Aristotelian ideas of motion; motion of the planets, geocentric, heliocentric; Galileo’s experiments; frames of reference; the Coriolis effect; graphs of motion: D/T, V/T, A/T.

Topics include nucleus: models, density, atomic mass unit; isotopes caused by neutron numbers; nuclear stability, nuclear force, mass defect; radioactivity, alpha, beta, gamma radiation; beta decay – neutron turning into a proton; alpha decay, gamma decay; half life, transmutation; nucleons made of quarks; uranium decay series.

This video looks at the practical application of nuclear energy, using footage from nuclear power stations and fusion laboratories. Topics include FISSION: – thermal and fast breeder reactors; FUSION: – Coulomb repulsion; plasmas; magnetic “bottle”; internal confinement – laser bombardment; REPROCESSING; DISPOSAL.

Two experiments are described and filmed. Topics include using static drops to balance mg against nqe; plotting voltages on drops; falling drops give size of drop; reasons for experimental error; Millikan’s questionable scientific method; the remarkable accuracy of Millikan’s work.