Edexcel A Level Physics:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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 ...
Edexcel A Level Physics:復習筆記5.14 Critical Angle
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...
Edexcel A Level Physics:復習筆記5.13 Refraction & Refractive Index
Refraction & Refractive Index Refraction occurs when light passes a boundary between two different transparent media At the boundary, the rays of light undergo a?change in direction?and?a chang...
Edexcel A Level Physics:復習筆記5.12 Equation for the Intensity of Radiation
Equation for the Intensity of Radiation Progressive waves transfer?energy The amount of energy passing through a unit area per unit time is the?intensity?of the wave Therefore, the?intensity?is def...
Edexcel A Level Physics:復習筆記5.11 Core Practical 7: Investigating Stationary Waves
Core Practical 7: Investigating Stationary Waves Aims of the Experiment The overall aim of the experiment is to measure how the frequency of the first harmonic is affected by changing one of the fo...
