41. What is/are the advantage(s) of step-index monomode fibre optical cable?
1. Manufacturing process is simple
2. Bandwidth of several GHz-km is possible
3. Splicing is easier
Select the correct answer using the options given below:
1. Manufacturing process is simple
2. Bandwidth of several GHz-km is possible
3. Splicing is easier
Select the correct answer using the options given below:
42. In an optical fiber, the light beam propagates due to which one of the following?
43. Which band specifies the operation range of Erbium doped fiber amplifier (EDFA)?
44. In optical communication, wavelength 1550 nm is used now a days. What is/are the possible reason(s)?
1. Dispersion is very low
2. Loss is very low
3. WDM and optical amplification are feasible
Select the correct answer from the options given below:
1. Dispersion is very low
2. Loss is very low
3. WDM and optical amplification are feasible
Select the correct answer from the options given below:
45. Attenuation of a narrow monochromatic X-ray beam in a metal plate of thickness d is given by:
46. Which one of the following instruction is useful while measuring the optical power as a function of wavelength?
47. A change in the refractive index of a material in response to an applied electric field is called . . . . . . . . effect.
48. In increasing order of spectral width of three optical sources are
49. What is the numerical aperture of an optical fiber when its critical angle is 30°
50. In a step index fibre the refractive index of core n1 = 1.48 and that of cladding n2 = 1.45. The numerical aperture of the fiber will be nearly:
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