Solved papers for JEE Main & Advanced JEE Main Online Paper (Held on 9 April 2013)

done JEE Main Online Paper (Held on 9 April 2013) Total Questions - 2

• question_answer1)                 A person lives in a high-rise building on the bank of a river 50 m wide. Across the river is a well lit tower of height 40 m. When the person, who is at a height of 10 m, looks through a polarizer at an appropriate angle at light of the tower reflecting from the river surface, he notes that intensity of light coming from distance X from his building is the least and this corresponds to the light coming from light bulbs at height ?Y? on the tower. The values of X and Y are respectively close to (refractive index of water\[\simeq \frac{4}{3}\])                   JEE Main Online Paper (Held On 09 April 2013)
  A)
                  25 m, 10 m                                         
  done clear
  B)
                  13 m, 27 m                                         
  done clear
  C)
                  22 m, 13 m                         
  done clear
  D)
                  17 m, 20 m 
  done clear
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• question_answer2) A ray of light of intensity I is incident on a parallel glass slab at point A as shown India gram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays AB and A 'B' undergo interference. The ratio of \[{{\operatorname{I}}_{\max }}\] and\[{{\operatorname{I}}_{\min }}\] is :              JEE Main Online Paper (Held On 09 April 2013)     
  A)
  49 : 1                                     
  done clear
  B)
  7 : 1                       
  done clear
  C)
   4 : 1                       
  done clear
  D)
  8 : 1                
  done clear
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