Stress marks on the edge of a radial crack near the point of impact ) parallel to the side on which the force was appliedb) perpendicular to the side of the glass facing outdoorsc) parallel to the side opposite the side on which the force was appliedd) perpendicular to the side on which the force was appliede) none of the above

A) parallel to the side on which the force was applied            

Explanation:

Glass is a hard and amorphous solid. The molecular structure of a glass has an irregular network of oxygen and silicon atoms filled with alkaline parts between them.

When an object is hit to a glass, it occurs fractures in it. The object forms two types of fractures . They are --

In case of radial fractures, the stress marks are in the direction parallel to the  direction of application of force.

In case of concentric force, the fracture is along the same side of the force.

Hence the correct option is (A).

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