hello guys pls ans this my small brother wants this am busy in my class so pls ans this to help him.......
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Step-by-step explanation:Define the following a) primary colour :- Any three colours of light that produce white light when combined with the correct intensity are called primary colours of light.
b) Ray diagram :- It is a diagram that traces tge path that light takes in order for a person to view a point on the image of an object.
f ) Speed :- It is the rate at which an object position changes, measured in meters per second.
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