How To Draw Lens Ray Diagrams

Method for cartoon ray diagrams – convex lens

A convex lens ray diagram is a simple way of visualising the path that lite rays take when passing through a convex lens.

To draw a ray diagram and find the location of the image that would be created on a screen you merely need to draw two ray lines. This is sometimes referred to every bit "The 2 rules of refraction for converging lenses". The but thing to call up is:

From the object
1. Pass a parallel line through the primary focal point
2. Pass a ray line through the centre of the convex lens

Here is each stage

ane. From the object, pass a parallel line through the main focal betoken. Nosotros usually choose the elevation of the object:

2. From the object, pass a ray line through the centre of the convex lens.

Where these 2 lines intersect is the top of the image. Draw a line vertically up to the principal centrality and you lot accept your complete image as below:

And that is it. It's that like shooting fish in a barrel.

We could finish the lesson there but Mammoth Retention just want to prove you lot that you could in fact use the aforementioned thought at whatsoever point on the object and the same ray diagram would work.

Permit's endeavor a ray diagram from the eye of the object.

Yous tin see nosotros could acquit out this ray diagram method anywhere on the object, but once again we emphasise that this is normally carried out from the elevation of the object.

Note: Some books inform you that there is i more rule for drawing ray diagrams and that is: from the object draw a line and so that it passes through the object'south side's principal focal bespeak on the way to the lens. This ray line will then refract and will travel parallel to the principal centrality.

The above is useful to know just not necessary in order to work out the image position. Only the first two rules are needed.

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Source: https://mammothmemory.net/physics/lenses/convex-lenses/method-for-drawing-ray-diagrams-convex-lens.html

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