This is because the amount of refraction taking place at the parallel faces of a glass slab is equal but opposite and since the faces are parallel the emergent ray emerges parallel to the incident ray with lateral displacement.
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The cross-sectional area of a concrete slab is the total area of the slab when viewed perpendicular to its length and width. To calculate the cross-sectional area, you multiply the length of the slab by the width of the slab. This measurement is crucial for determining the amount of concrete needed for a project and for ensuring the structural integrity of the slab.
V of a circular slab = thickness of the slab multiplied by (pi multiplied by the radius2)
Multiply the length by the breadth. eg if slab is 2 ft by 3 ft then area of slab = 6 sq feet
Probably none because a slab of granite would be measured in cubic feet.
Usually the serif fonts are divided into 2 categories, slab serif and serif. Clarendon is an example of a slab serif.