Colour-blindness
Light of Class 8
DEFINATION OF COLOUR-BLINDNESS
The retina of our eye has a large number of light-sensitive cells having shapes of rods and cones. The rod-shaped cells respond to the intensity of light with different degrees of brightness and darkness whereas the cone-shaped cells respond to colors. In dim light rods are sensitive but cones are sensitive only in bright light. The cones are sensitive to red, green, and blue colors of light to different extents.
Due to genetic disorders, some persons do not possess cone-shaped cells that respond to certain specific colors only. Such persons cannot distinguish between certain colors but can see well otherwise. Such persons are said to have color-blindness. Driving licenses are generally not issued to persons having color-blindness. NCERT solutions for class 8 Scienceprepared by Physics Wallah will help you to solve your NCERT textbook exercise.
