Scientists discover nano engine

Q.  Scientists have developed the world’s smallest engine. What it is powered by?
- Published on 05 May 16

a. Petrol
b. Water
c. Electricity
d. Light

ANSWER: Light
 
Scientists have developed the world's tiniest engine -just a few billionths of a metre in size -which is powered by light
  • This may help develop nano-machines that can navigate in water, sense the environment around them, or even enter living cells to fight disease.
  • When the 'nano-engine' is heated to a certain temperature, it stores large amounts of elastic energy in a fraction of a second. Light can be used to power the piston of the nano engine.

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