Question

Can electricity and light bring about reversible and irreversible changes? Give examples

Answer 1

Reversible: the light goes on, producing illumination; it goes off and it's as dark as it was.

Irreversible: light causes a plant to grow which is not immediately reversed when the light is turned off

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Answer 2

Yes, electricity and light can bring reversible and irreversible changes.

• Light :

Reversible change - The light illuminate it's surrounding's environment which is reversible when we turn off the source of the light.

Irreversible change - The light coming from the sun,is necessary for the chemical reactions of the photosynthesis of the green plants. And,this reaction is an irreversible change.

• Electricity :

Reversible change - The electricity flow can create heat energy in the conductive materials but it is reversible when we turn off the source of the electricity.

Irreversible change - The electroplating process includes the electricity supply and it's an irreversible process.