Wednesday, 25 June 2014 15:14

## I1-14: THERMAL EXPANSION OF ALUMINUM - OPTICAL LEVER

• ID Code: I1-14
• Purpose: Demonstrate thermal expansion in a complicated way.
• Description: A small mirror with an iron lever attached to it rests on one end of an aluminum tube. The other edge of the lever rests on the pole of a magnet. When the aluminum tube is heated with a burner the mirror is deflected. To measure this deflection a laser beam is reflected off the mirror onto a scale as shown in the picture. When the tube is heated the laser spot is deflected about 50 cm when the distance between the mirror and the scale is about 2 m. The picture at the right is a detail of the mirror mount.
• Availability: Available
• Loc codes: I1, I0
Read 2843 times Last modified on Wednesday, 09 September 2020 16:53
• #### I1-01: THERMOMETERS

Show several types of thermometers. Read More
• #### I1-11 THERMAL EXPANSION - BALL AND HOLE

Illustrate thermal expansion in a paradoxical way. Read More
• #### I1-12: THERMAL EXPANSION - BALL AND RING

Demonstrate thermal expansion. Read More
• #### I1-13 THERMAL EXPANSION - BIMETAL STRIP

Demonstrate differential thermal expansion. Read More
• #### I1-14: THERMAL EXPANSION OF ALUMINUM - OPTICAL LEVER

Demonstrate thermal expansion in a complicated way. Read More
• #### I1-15: THERMAL EXPANSION - PIN BREAKER

Demonstrate thermal expansion in a dramatic way. Read More
• #### I1-16: THERMAL CONTRACTION OF CUPS WITH LN

Measure coefficients of linear expansion. Read More
• #### I1-17: THERMOSTAT - MODEL

Model of use of a bimetal strip in a thermostat. Read More
• #### I1-18: BIMETALLIC STRIP THERMOMETERS

Allow students to see how bimetallic strips are used in thermometers and thermostats. Read More
• #### I1-19: LAVA LAMP

Demonstrate differential thermal expansion between two liquids, and to take us all back to the 1960s. Read More
• #### I1-21: WATER NEAR 4 DEGREES CELCIUS

Demonstrate that the maximum density of water occurs around 4 degrees centigrade. Read More
• #### I1-22: WATER DENSITY VS TEMPERATURE

Demonstrate the change in the density of water with temperature. Read More
• #### I1-32: RUBBER BAND CONTRACTION DURING HEATING

To demonstrate that rubber contracts when heated. Read More
• #### I1-40: REVERSIBLE THERMOELECTRIC DEMONSTRATOR

Demonstrate thermoelectric power generation or how thermoelectric devices can create hot and cold regions. Read More
• #### I1-41: THERMOELECTRIC MAGNET

Demonstrate production and use of thermoelectric current. Read More
• #### I1-42: THERMOELECTRIC FAN

Illustrate generation and use of thermoelectric current. Read More
• #### I1-51: RUBBER AT LN TEMPERATURE

Demonstrate how a normally elastic material at room temperature becomes rigid at very low temperatures. Read More
• #### I1-52: TUNING FORK AT LIQUID NITROGEN TEMPERATURE

Demonstrate the change in frequency of a tuning fork at liquid nitrogen temperature. Read More
• #### I1-53: LEAD BELL AT LIQUID NITROGEN TEMPERATURE

Demonstrate the effect of temperature on vibrations in a lead bell. Read More
• #### I1-61: DUST EXPLOSION

Produce a dust explosion. Read More
• #### I1-62: DUST EXPLOSION MODEL

Show why small particles of flammable material can create a dust explosion when ignited. Read More
• #### I1-63: HYDROGEN EXPLOSION

Produce a hydrogen explosion. Read More
• #### I1-64: BURNING CANDLE - COMBUSTION PROCESS

Demonstrate features of the burning process and to debunk myths about this supposedly well-known demonstration. Read More
• #### I1-71: SHAPE-MEMORY ALLOY - THERMOBILE

Illustrate shape-memory alloy. Read More
• #### I1-72: SHAPE-MEMORY ALLOY - ICEMOBILE

Illustrate shape-memory alloy. Read More
• #### I1-73: SHAPE-MEMORY ALLOY - COOL CRAFT

Illustrate shape-memory alloy. Read More
• #### I1-74: SHAPE-MEMORY ALLOY - CLOVER

Illustrate shape-memory alloy. Read More
• 1