Question

- Fan in moving
position, their are
gaps between them.when we light on the gaps we see the wall and a layer of air when the fan is in low speed.when we light on the blade of fan it is
opaque . if it is wrong give reason ​

Answer 1

Ans:-

If you would look carefully to the fan and then you can see that there are three gaps in the fan in between that blades. so when the fan moves in a high-speed we cannot see the blades but we can see that at that time the fan is like a transparent medium but actually the blade is not transparent but it is opac but when the fan is moving in a low speed at that time we can see the Blades of the fan that is opac but due to the gap between them we can we see the fan is that it is a transparent medium when it is moving but since the answer is that the fan is opac open when it is moving slowly.