What is the focal length and power of a rectangular glass slab?
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The focal length of rectangular glass slab is Infinity. And hence the power is reciprocal of focal length, that is zero. Hence the rectangular glass slab does not converges or diverges the ray of light as it has power zero.
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Answer:
Focal length of a glass slab is infinity.
Power of a glass slab is zero.
Power=reciprocal of Focal length
Power =1/infinity=0
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