JEE Exam  >  JEE Questions  >  PARAGRAPH 1Light guidance in an optical fiber... Start Learning for Free
PARAGRAPH 1
Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.
Q.
If two structures of same cross-sectional area, but different numerical apertures NA1 and
 NA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure is
  • a)
  • b)
    NA1 + NA2
  • c)
    NA1
  • d)
    NA2
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
PARAGRAPH 1Light guidance in an optical fiber can be understood by con...
For total internal reflection to take place in both structures, the numerical aperture should be the least one for the combined structure & hence, correct option is D.
View all questions of this test
Explore Courses for JEE exam

Similar JEE Doubts

PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer?
Question Description
PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer?.
Solutions for PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free.
Here you can find the meaning of PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer?, a detailed solution for PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice PARAGRAPH 1Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index n1 surrounded by a medium of lower refractive index n2. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media n1 and n2 as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index n1. The numerical aperture (NA) of the structure is defined as sin im.Q.If two structures of same cross-sectional area, but different numerical apertures NA1 andNA2 (NA2 < NA1 ) are joined longitudinally, the numerical aperture of the combined structure isa)b)NA1 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice JEE tests.
Explore Courses for JEE exam

Top Courses for JEE

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev