Edexcel A Level Physics:复习笔记5.23 Magnification
Magnification Magnification as a Ratio of Heights Magnification means how much larger the image is than the object This is the ratio of the image/object height ?Where: m?= magnification hi?= image ...
Edexcel A Level Physics:复习笔记5.22 The Lens Equation
The Lens Equation This equation can be applied to all?thin converging?and?diverging?lenses The equation relates the?focal length?of the lens to the?distances?from the?lens?to the?image?and the?obje...
Edexcel A Level Physics:复习笔记5.21 Real & Virtual Images
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 ...
Edexcel A Level Physics:复习笔记5.20 Thin Lenses in Combination
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...
Edexcel A Level Physics:复习笔记5.19 Power of a Lens
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...
Edexcel A Level Physics:复习笔记5.18 Using Ray Diagrams
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...
Edexcel A Level Physics:复习笔记5.17 Converging & Diverging Lenses
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 ...
Edexcel A Level Physics:复习笔记5.16 Measuring Refractive Index
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 ...
Edexcel A Level Physics:复习笔记5.15 Total Internal Reflection
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 ...
