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Opening the lens' true being.....

So...........................
We conducted a lot of experiments (physically) consulted some experts and finally was able to find out a proper way of implementing the physics in three.js. Read on.......

1. What is a lens??? A lens is basically a part of a sphere




2. What is the radius of curvature of a lens???
It is the radius of the sphere of which, it is a part.

3. What is the refractive index (u) of a lens.
In optics the refractive index (or index of refraction) n of a substance (optical medium) is a dimensionless number that describes how light, or any other radiation, propagates through that medium.

4. What happens when light passes through a lens???


The light bends depending on the radius and the u of the lens......

5. What is the focus of a lens?
It is the point where all the rays intersect the principal axis after convergence.

6. What happens when an object placed on side A is being viewed from different angles on side B???



The eye, the focus and the image is always lying on the same line.....
The reason for the displacement of the image is due to the curvature of the lens.

7. What is the relation between the focal length, the refractive index(u), and the radius of curvature(R).

This is related by the modified lens maker's formula
1/f = 2(u-1)/R
So from this it is evident that for a lens of constant refractive index, the focal length is directly proportional to radius of curvature. So this is what happens when the radius of curvature decreases.....



So these are some of the basic stuff that should be known to a developer who intends to build a virtual lab for the optics experiment......


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