Why might you only see a rainbow when rain is in front of you

rain acts like a light prism which displays rainbow colors when light is shown through

We see rainbow when the sun is behind us and and falling rain is in front of us

Explanation:

when sunlight strikes a falling drop of water it is retracted , changed indirection, by the surface of the water

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.