00:02
In this question, we have a converging lens, 9 cm focal length, and then you use it to view a splinter, place 6 cm from the lens.
00:14
So in this skill drawing, each box is 3 cm, so this is the object distance, and then this is the focal length, right? okay, we want to use ray tracing to find out the image distance as well as the magnification of the splinter.
00:44
So we are dealing with converging lens.
00:47
There are three rays that we will draw.
00:50
A ray initially parallel to the optical axis reflects through the far focal point.
00:56
Second array that enters the lens along a line through the near focal points, images parallel to the axis.
01:03
And then the third one is the ray through the center of the lens.
01:05
Of the lens, that's not bad, okay? so let's go through the rays one by one.
01:14
So i always like to first draw the ray that through the center of the lens because it's just a straight line.
01:22
And then next, i would draw the ray that's parallel to the optical axis.
01:29
And then you just draw the line through the focal points to the far focal point.
01:36
Okay, then you draw, so just to indicate the type of ray.
01:45
So this is ray tree.
01:47
This is ray one...