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A ray of light is incident normally on the first refracting face of the prism of refracting angle A. The ray of light comes out at grazing emergence .If one half of prism is knocked off then .what will haooen to the same ray?

A ray of light is incident normally on the first refracting face of the prism of refracting angle A. The ray of light comes out at grazing emergence .If one half of prism is knocked off then .what will haooen to the same ray?

Grade:12

1 Answers

Arun
25750 Points
6 years ago
Dear Ashwin
 

Let me list down a few of the advantages first.

  • In comparison to a solid shaft, a hollow shaft is of less weight, for a given length and diameter. This is pretty obvious and wont be requiring any further explanation. Moreover it’s a good idea to go ahead with hollow shafts, if we our emphasis is on weight reduction and cost-cutting.
  • Hollow shafts are much better to take torsional loads compared to solid shafts. As shown in the figure, shear stress in a “shaft subjected to torsion” varies linearly from zero at the center to the maximum at the boundary. Inside a solid shaft, most of the material experiences / carries a shear stress whose value is much below the maximum shear stress [Interior portion of the shaft]. But at the same they are adding to the weight, without contributing much to the capability of the shaft to carry torsional load.
  • Hollow shaft has a greater Strength to weight ratio.
Regards
Arun (askIITians forum expert)

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