Straw appears to be broken . But it is actually not.
It appears like that because of refraction of light .
Usually the light goes in a straight line. But if the light passes through different mediums , its path is bent or refracted.
Now we are looking at the straw through a glass of water. Light from the part of the straw which is underwater comes to our eye which is outside , I mean to say in outside air.
Here , light has to travel through 2 mediums i.e. water and then air. When light comes from water to air, it changes its direction i.e. refracted.
Light comes to eye from a slightly different angle , hence the straw looks bent .
It appears like that because of refraction of light .
Usually the light goes in a straight line. But if the light passes through different mediums , its path is bent or refracted.
Now we are looking at the straw through a glass of water. Light from the part of the straw which is underwater comes to our eye which is outside , I mean to say in outside air.
Here , light has to travel through 2 mediums i.e. water and then air. When light comes from water to air, it changes its direction i.e. refracted.
Light comes to eye from a slightly different angle , hence the straw looks bent .
