Physics
In which one of the following the phenomenon of total internal reflection of light is used ?

Working of binoculars
Formation of rainbow
Twinkling of stars
Formation of mirage

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Physics
Which statement best describes an igneous intrusion?

Magma is exported to an open area and forms iron
Magma explodes to the surface and forms a smooth outer layer of rock
Magma is injected into surrounding rock forming an igneous intrusive
Igneous intrusion for when ice crystals splash into lava

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