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Between the primary and secondary rainb...

Between the primary and secondary rainbows, there is a dark band known as Alexander's dark band. This is because

A

this region forms an image on blind spot on retina.

B

there is no light scattered into this region.

C

light is absorbed in this region.

D

angle made at the eye by the scattered rays with respect to the incident light of the sun lies between approximately `42^@` and `50^@`.

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