( a ) Figure shows a cross - section of a ' light pipe ' made of a glass fibre of refractive index 1.68 . The outer cove

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answerhappygod
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( a ) Figure shows a cross - section of a ' light pipe ' made of a glass fibre of refractive index 1.68 . The outer cove

Post by answerhappygod »

( a ) Figure shows a cross - section of a ' light pipe '
made of a glass fibre of refractive index 1.68 . The outer covering
of the pipe is made of a material of refractive index 1.44 . What
is the range of the angles of the incident rays with the axis of
the pipe for which total reflections inside the pipe take place ,
as < ; shown in the figure . b ) What is the answer if there is
no outer covering of the pipe ?
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