refracted light waves always bend towards the what that slows them down
medium
curves outward and causes rays of light passing through it to bend inward on a point
convex lens
occurs when light rays from a distant object by heated air so that the object appears to be nearby
mirage
is also caused by a refraction of light
scintillation
can only be seen when rain or a heavy mist is in front of the viewer and the suns rays are shining from behind the viewer
rainbows
which appears above the primary rainbow,forms as light rays that enter the bottom of the drop are reflected twice instead of once and exit the top of the drop
secondary rainbow