The_shadow_velocity_is_given_by_0.4_‚âà√≠¬¨‚à´m_‚âà√≠¬¨‚à´s-1_and_shadow_pulse_of_width_300_‚âà√≠¬¨‚à´s_is_registered_at_an_instant_by_the_photodetector._Determine_the_outer_diameter_of_the_optical_fiber_in_‚âà√≠¬¨‚à´m.$#

The_shadow_velocity_is_given_by_0.4_‚âà√≠¬¨‚à´m_‚âà�

1.	The_shadow_velocity_is_given_by_0.4_‚âà√≠¬¨‚à´m_‚âà√≠¬¨‚à´s^-1_and_shadow_pulse_of_width_300_‚âà√≠¬¨‚à´s_is_registered_at_an_instant_by_the_photodetector._Determine_the_outer_diameter_of_the_optical_fiber_in_‚âà√≠¬¨‚à´m.$#
A.	100 ‚âà√≠¬¨‚à´m
B.	120 ‚âà√≠¬¨‚à´m
C.	140 ‚âà√≠¬¨‚à´m
D.	90 ‚âà√≠¬¨‚à´m
Answer» C. 140 ‚âà√≠¬¨‚à´m

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The techniques used to determine the refractive index profile can also be used to determine the core diameter.
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The_shadow_velocity_is_given_by_0.4_‚âà√≠¬¨‚à´m_‚âà√≠¬¨‚à´s<sup>-1</sup>_and_shadow_pulse_of_width_300_‚âà√≠¬¨‚à´s_is_registered_at_an_instant_by_the_photodetector._Determine_the_outer_diameter_of_the_optical_fiber_in_‚âà√≠¬¨‚à´m.$#
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The_shadow_velocity_is_given_by_0.4_‚âà√≠¬¨‚à´m_‚âà√≠¬¨‚à´s-1_and_shadow_pulse_of_width_300_‚âà√≠¬¨‚à´s_is_registered_at_an_instant_by_the_photodetector._Determine_the_outer_diameter_of_the_optical_fiber_in_‚âà√≠¬¨‚à´m.$#

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The_shadow_velocity_is_given_by_0.4_‚âà√≠¬¨‚à´m_‚âà√≠¬¨‚à´s^-1_and_shadow_pulse_of_width_300_‚âà√≠¬¨‚à´s_is_registered_at_an_instant_by_the_photodetector._Determine_the_outer_diameter_of_the_optical_fiber_in_‚âà√≠¬¨‚à´m.$#