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VCE Physics Unit 2 AOS 2
Lenses and Refraction
The study of vision begins with the ray model of light and the principle of refraction. Lenses, which are carefully shaped transparent materials, form images by bending light. The two main types, convex and concave, have distinct effects on parallel light rays.
Convex (Converging) Lens
Thicker in the middle. Causes parallel light rays to converge to a single point (the principal focus).
Concave (Diverging) Lens
Thinner in the middle. Causes parallel light rays to spread out as if from a single point.
Interactive Lens Simulator
Explore the thin lens equation $\frac{1}{f} = \frac{1}{d_{o}} + \frac{1}{d_{i}}$ in action. Adjust the object’s distance from a converging lens to see how the image’s position, size, and type (real or virtual) change. Observe the relationship between object position (relative to the focal point F) and the image characteristics.
Correcting Vision Defects
When the eye cannot focus an image correctly onto the retina, vision defects occur. See how artificial lenses correct for Myopia (short-sightedness) and Hypermetropia (long-sightedness). Select a condition to see a simplified diagram of the problem and its solution.
The AC to DC Conversion Process
A charger converts high-voltage AC from a wall socket into low-voltage DC for a device. This is a multi-stage process where each component solves a problem. Click through the stages to see how the voltage waveform is transformed.
The Four Forces of Flight
In steady, level flight, an aircraft is a system in equilibrium, with four forces perfectly balanced. Click on each force in the diagram to learn its origin and how it is controlled. Understanding this balance is key to understanding all flight maneuvers.
How is Lift Generated?
Lift is the upward force that counters gravity, generated by the wings moving through the air. Physicists use two complementary models to explain this complex phenomenon. Toggle between the models to see how each one contributes to our understanding of lift.
