Question

Why are red and green complementary colors?

Answer 1

Complementary colors can create some striking optical effects. The shadow of an object appears to contain some of the complementary color of the object. For example, the shadow of a red apple will appear to contain a little blue-green.

Hope This Helps You :)

Answer 2

$\huge\green{As-Salamu-Alykum}$

______________

Remember that when one or more colors are absorbed and the others are reflected so that substance will give color of reflected colors .

When red color is absorbed and the other are reflected that substance appears to be green .

THATS WHY

Red and green are called complimentary colors .

__________________

$\huge\blue{INSHALLAH it will help U}$