Physics
What is the wavelength of visible spectrum ?

1300 A°–3000 A°
7800 A° – 8000 A°
8500 A° – 9800 A°
3900 A° – 7600 A°

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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 adhesion are less
The forces of cohesion are very large

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