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Describe an experiment to demonstrate the thermal expansion in solids. - Physics

Short Note

Describe an experiment to demonstrate the thermal expansion in solids.

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Solution

Experiment: [Gravesand’s ball and ring experiment

Take metallic ball and ring so that ball can pass through the ring easily. Now heat the ball. We see that the heated ball cannot pass through the same ring. This is because on heating the ball increases in size. Now on cooling the ball again, it can pass through the ring. This experiment shows that solids expand on heating and contract on cooling. 

Concept: Compare Expansivity in Solids, Liquids and Gases
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APPEARS IN

Selina Concise Physics Class 8 ICSE
Chapter 6 Heat Transfer
Short/long Answer Questions | Q 17 | Page 121
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