Ray Tracing Convex lens Object 1 3 F
“Ray Tracing – Convex lens” Object 1 3 F F Principal axis 2 Image Ray 1. Incident ray parallel to the principal axis - emerges through the focal point Ray 2. Incident ray through the focal point - emerges parallel to the principal axis Ray 3. Incident ray through the pole of the lens - emerges unaffected NB: Image is formed at the intersection point of the emerging rays (Image is inverted, enlarged & real)
“Ray Tracing – Convex lens” Object placed at beyond double the focal length (>2 f) Object F F Principal axis Image
“Ray Tracing – Convex lens” Object placed at double the focal length (2 f) Object F F Principal axis Image
“Ray Tracing – Convex lens” Object placed between the focal length (f) and double the focal length (2 f) Object F F Principal axis Image
“Ray Tracing – Convex lens” Object placed at the focal length (f) Object F F Principal axis
“Ray Tracing – Convex lens” Object placed between the focal length (f) and pole of mirror Image Object F F Principal axis
“Ray Tracing – Convex lens” Summary Table Image description Object position Type Orientation Size Magnification >2 f Real Inverted Diminished 1/2 2 f Real Inverted Same 1 Between 2 f & f Real Inverted Enlarged 2 f Between f & pole No image formed Virtual Upright Enlarged 2
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