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Most Important Selected Qs for JEE AdvancedPhysicsThermal Properties of Matter

Paragraph: You are program director in ISRO (Indian Space Research Organisation) to conduct a feasibility study into the SDI (Strategic Defence Initiative) missile defence system. You are to consider the viability of a ground based laser defence against ICBM's, which will use powerful CO ₂ lasers to bore holes in the incoming missiles, thus destroying them. The lasers have an output power of 50 W in a beam diameter o

Options

  1. A50W
  2. B24.8 W
  3. C36.9 W
  4. DNone of these

Correct answer

C. 36.9 W

Step-by-step solution

Required power of beam = ( 97 100 )¹⁰ 50=36.9 ~W

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