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Three torches \(A\), \(B\) and \(C\) shown in figure are switched on one by one. The light from which of the torches will not form a shadow of the ball on the screen.
 
YCIND_220922_4494_figure_11_7.png
Experimental set-up
 
The light from torch will not form a shadow of the ball on the screen. Light travels in a but the torch the screen. Hence, light cannot pass through the screen.