why we are not able to see the candle flame through a bent pipe

Hi!!!
When we try to see a candle flame through a straight pipe , we can see it very clearly but, in the case of a bent pipe we cannot see it because light travels in a straight line and never bends. We are able to see because of light and it cannot pass through a Bent tube, as a result we cannot see the candle flame. This property of light of traveling in a straight line is known as The Rectilinear propagation of light. Thus, the candle flame cannot be seen through a bent tube as light doesn't bend.
Thumbs up!!!

IT IS BECAUSE LIGHT TRAVELS IN A STRAIGHT LINE

because of the phenominon that light travels in straight line.
 

We are not able to see the candle flame through a bent pipe as light travels in straight line.

Because light travels in a straight line not in a bent line that is why we cant see the candle flame through a bent pipe.
This activity proves that light travels in a straight line and this movement is known as rectilinear propagation of light.

because light travels in a straight line
 

light travels in a straight line
 

BCS. LIGHT TRAVELS IN A STRAIGHT LINE

When there are more than two interpretations of an ambiguous stimulus it is called multi stable. The Necker cube is one of the most classic examples of a bistable figure. Sometimes it looks like it is facing upwards while at other times it is facing downwards.

SORRY FOR THE PRE. POST
 

because the light travels in a straight line