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Light guidance in an optical fibre 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 structure 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
Light guidance in an optical fibre can be understood by considering a ...
Here NA2 < NA1
∴ the NA of combin ed structure is equal to the smaller value of the two numerical apertures.
(d) is the correct option.
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Light guidance in an optical fibre 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 structure 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 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer?
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Light guidance in an optical fibre 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 structure 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 + 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 Light guidance in an optical fibre 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 structure 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 + 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 Light guidance in an optical fibre 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 structure 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 + NA2c)NA1d)NA2Correct answer is option 'D'. Can you explain this answer?.
Solutions for Light guidance in an optical fibre 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 structure 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 + 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.
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