Using ray diagrams to better understand everyday reality – Demo

Using ray diagrams to better understand everyday reality – Demo

One of the easiest way to visualize ray diagrams for lenses is by using an array of arrows on the board as the object and the camera on your phone as the screen.

(i) Convex Lens : Arrows on the board are placed outside the focal length of the lens -> Inverted image

Convex lens ray diagram visualization
Convex lens demo-outside the focal point

(ii) Convex Lens :Arrows on the board are placed inside the focal length of the lens -> Magnified Erect image

Convex lens demo- inside the focal point
Convex lens ray diagram visualization

(iii) Concave Lens: Irrespective of whether you place the arrows inside or outside the focal length, you get an erect image.

concave lens demo
concave lens ray diagram

(iv) Convex mirror: Virtually erect image formed from a Christmas ornament

The following video from UCLA extends the ray diagram analysis for concave and convex mirrors:

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