Real & Virtual Images Real Images Are formed when light rays from a point on an object?pass through another point?in space The light rays are?really there Can be?formed on a screen Are seen in ...
COMC(Canadian Open Mathematics Challenge)加拿大數學奧賽，又稱加拿大數學公開賽，是由國際權威學術機構加拿大數學學會 (CMS) 舉辦。作為加拿大最具影響力的數學學術活動，每年參加人數高達上萬，除此之外，COM...
Thin Lenses in Combination When?multiple lenses?are used in?series?(one after the other) this is called a?compound lens To find the?total power?of a compound lens, find the?sum of the powers?of the...
Power of a Lens The?power?of a lens is a measure of its ability to?refract?light The?more?refraction a lens causes, the?higher?its power The?power?of a lens measures how strongly it focuses the lig...
Using Ray Diagrams Describing images formed by lenses Images are described using three concepts They are either: Real?or?virtual Bigger?than, the?same size?as or?smaller?than the object Inverted?or...
Converging & Diverging Lenses A lens is a piece of equipment that forms an image by?refracting?light There are two types of lens: Convex Concave Convex Lenses In a convex lens, parallel ...
Measuring Refractive Index Aim of the Experiment To investigate the?refraction?of light through a?perspex block Equipment Ray Box - to provide a narrow beam of light to refract through the perspex ...
Total Internal Reflection Total internal reflection (TIR) occurs when: The angle of incidence is greater than the critical angle and the incident refractive index?n1?is greater than the refractive ...
Critical Angle As the angle of incidence is increased, the angle of refraction also increases until it gets to 90° When the angle of refraction is exactly 90° the light is refracted along the bound...
