Question

why yellow is brighter color than red after all it has smaller wavelength than red ?

insipid answer is not allowed ok​

Answer 1

yellow

This, combined with the neuronal nirvana resulting from the overlapping sensitivity of the red and green cones, is why yellow appears to be the brightest color in the spectrum, making it a unique and useful colornation:

Answer 2

Answer:

Many colours are bright even yellow is very bright because yellow is dirty fellow