Answer :

The principal to solve these types of question is that "The objects reflects its true colour and will absorb any other colour light".

1.Green


When green light falls on the green leaves and red flower, green leaves will reflect green light because there true colour is green and will appear as green leaves while red flower will absorb green light because its true colour is red and will appear as a black object.


2.Yellow


This is a tricky question, as yellow colour is mixture of red and green hence we can say that yellow light has both red as well as green light.


So, when a yellow light falls upon a red flower it will absorb the green part and will reflect red light part. And will appear as a red flower.


Also, when yellow light falls upon green leaves it will reflect green part but will absorb red light part. Hence so showing its true colour that is green.


3.Red


When red light falls on the green leaves and red flower, green leaves will absorb red light because there true colour is green and will appear as black leaves while red flower will absorb red light because its true colour is red and will appear as red flowers.


4.Blue


When blue light falls on the green leaves and red flower, green leaves and red flower will both absorb the blue light and will appear as a black object. Because there true colour is red and green while the light is blue.


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