Tuesday, 21 January 2020 09:00
Q3-01: Helix Diffraction
Additional Info
- ID Code: Q3-01
- Purpose: To model the structure of a helical molecule
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Description:
The spiral structure of DNA was discovered through diffraction. This demonstration shows a simplified model, diffraction through a single (rather than double) helix. Several springs are mounted to enable the laser to be pointed at each in turn, including one distorted to show the effect of changing the angle.
(photo credit: Mary Chessey, UMD) - Availability: Available
Published in
Q3 Genetics and Molecular Biology
Tagged under
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G1-01 EXAMPLES OF SIMPLE HARMONIC MOTION
Illustrates simple harmonic motion
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G1-11 COMPARISON OF SHM AND UCM
Demonstrates the relationship between simple harmonic motion and uniform circular motion
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G1-12: PENDULUM AND ROTATING BALL
Demonstrate that simple harmonic motion is the projection of uniform circular motion Read More
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G1-13: MASS ON STRING
Illustrate uniform circular motion Read More
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G1-14 PENDULA WITH DIFFERENT MASSES
Demonstrates independence of a simple pendulum's period with mass of the bob
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G1-15 PENDULA WITH 4 TO 1 LENGTH RATIO
Shows that period of a simple pendulum is proportional to the square root of its length
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G1-16: PENDULUM WITH LARGE OSCILLATION
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G1-18: PENDULUM WITH FORCE SCALE
Show the tension in the string exerted by a swinging pendulum Read More
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G1-20: GALILEO'S PENDULUM AND THE PENDULUM RELEASE CONUNDRUM
Encourage thought about the motion of a pendulum and related forces Read More
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G1-31: HOOKE'S LAW AND SHM
Quantitatively demonstrate how the spring constant affects the period of a mass on a spring Read More
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G1-32: MASS ON SPRING - WITH STAND
Illustrate SHM Read More
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G1-33 MASSES AND SPRINGS WITH SPIDER
Compares frequencies of various mass-spring combinations
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G1-34: AIR TRACK - SIMPLE HARMONIC MOTION
Demonstrate simple harmonic motion of a mass held by two springs Read More
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G1-35: MASS ON SPRING - EFFICIENT MODEL
Illustrate the motion of a mass on a spring Read More
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G1-36: MASS ON SPRING WITH FORCE MEASUREMENT
Display the time dependence of the force of a mass oscillating on a spring Read More
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G1-37: MASS ON SPRING WITH ULTRASONIC RANGER
Plot graphs of position, velocity and acceleration for a mass oscillating on a spring Read More
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G1-41: TORSIONAL PENDULUM - SMALL
Demonstrate torsional SHM, and to show the effect of moment of inertia on the period Read More
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G1-43: KLINGER TORSIONAL VIBRATION MACHINE
Demonstrate torsional SHM, and to quantitatively show the effect of moment of inertia on the period Read More
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G1-51: INVERTED SPRING PENDULUM
Illustrate a form of periodic vibration Read More
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G1-52 STRINGLESS PENDULUM
Demonstrates an example of SHM
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G1-53: SHM - CAN IN WATER TANK
Demonstrate one form of SHM Read More
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G1-54: MASS'S DOUBLE PENDULUM
Demonstrate the transition of potential energy into energy of oscillation of the pendulum, and the operation of an escapement Read More
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G1-55: INERTIA BALANCE
Illustrate the measurement of inertial mass using SHM Read More
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G1-56: INVERTED PENDULUM - SABER SAW
Show the inverted pendulum dramatically Read More
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G1-57: INVERTED PENDULUM - SPEAKER DRIVEN
Demonstrate the conditions for stability of an inverted pendulum Read More
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G1-58: LOADED PENDULUM
Analog to the longitudinal motion of a particle in a particle accelerator driven by a sinusoidal accelerating potential Read More
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G1-59: BIFILAR PENDULUM
Illustrate a system with two pendular modes of oscillation Read More
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G1-60 CHAOS - TWO BIFILAR PENDULA
Illustrates chaotic motion
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G1-71: LISSAJOUS FIGURES - SAND PENDULUM
Demonstrate Lissajous figures Read More
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G1-73: LISSAJOUS FIGURES - FOURIER SYNTHESIZER
Show stable Lissajous figures Read More
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G1-74: LISSAJOUS FIGURES - LASER AND LOUDSPEAKER
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G1-81: OUIJA WINDMILL
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Create waves in a very dramatic way using a series of fifteen carefully adjusted independent pendula Read More
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G1-83: PENDULUM WAVES - COMMERCIAL VERSION
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