Question

We all have seen 3D movies. Have you ever imagined how we can we explain dimensions of a 3D object.

Answer 1

Dear student.
Most of the objects around you are 3-D.
It has length breadth and depth as the 3 dimentions.
If you look at an object near you and close your left and right eyes in turn, you’ll see that each has a slightly different view of the world. Your left eye sees a bit more of the left side of the object, and your right eye sees a bit more of its right side. Your brain fuses the two images together allowing you to see in three dimensions. This is known as stereoscopic vision.
In old fashioned 3D films, footage for the left eye would be filmed using a red lens filter, producing a red image, and footage for the right eye would be shot using a blue filter, resulting in a blue image. Two projectors then superimposed the images on the cinema screen.
3D glasses with blue and red filters ensured viewers’ left and right eyes saw the correct image: the red filter would only let red light through to your left eye, and the blue filter would only let blue light through to your right eye. Your brain would then combine these two slightly different images to create the illusion of 3D

3D glasses now use polarized light about which you will learn in higher classes