1.

A burning candle is placed on a table. We can see the light of candle flame when we see it from:

A. Bent tube \[\to \] by keeping only one eye open.
B. Straight tube \[\to \] by keeping only one eye open.
C. Spiral tube \[\to \] by keeping only one eye open.
D. U-shape tube.
E. None of these
Answer» C. Spiral tube \[\to \] by keeping only one eye open.


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