Ray Optics · JEE Main previous year questions

2016 2 questions

1. Q492016 · 3 Apr 2016 · Shift 1

   An observer looks at a distant tree of height $10\mathrm{m}$ with a telescope of magnifying power of 20. To the observer the tree appears:

   1. A.20 times taller
   2. B.20 times nearer
   3. C.10 times taller
   4. D.10 times nearer
   Show answer

   Answer: B

2. Q502016 · 3 Apr 2016 · Shift 1

   In an experiment for determination of refractive index of glass of a prism by $i-\delta$ plot, it was found that a ray incident at angle $35^{\circ }$, suffers a deviation of $40^{\circ }$ and that it emerges at angle $79^{\circ }$. In that case which of the following is closest to the maximum possible value of the refractive index?

   1. A.1.7
   2. B.1.8
   3. C.1.5
   4. D.1.6
   Show answer

   Answer: C