Ray Optics · JEE Main previous year questions

2002 3 questions

1. Q1292002 · 27 Apr 2002 · Shift 1

   An astronomical telescope has a large aperture to

   1. A.reduce spherical aberration
   2. B.have high resolution
   3. C.increase span of observation
   4. D.have low dispersion
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   Answer: B

2. Q1302002 · 27 Apr 2002 · Shift 1

   If two mirrors are kept at $60^{\circ }$ to each other, then the number of images formed by them is

   1. A.$5$
   2. B.$6$
   3. C.$7$
   4. D.$8$
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   Answer: A

3. Q1332002 · 27 Apr 2002 · Shift 1

   Which of the following is used in optical fibres?

   1. A.total internal reflection
   2. B.scattering
   3. C.diffracttion
   4. D.refraction
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   Answer: A