Physics
When light passes from one medium to another, this phenomenon of change in its direction is called ________

Refraction
Diffraction
Propagation
No option is correct

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Physics
Solids have definite shapes.This is because

The forces of cohesion of the molecules within are very much less in them
The forces of adhesion are large
The forces of cohesion are very large
The forces of adhesion are less

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