Edexcel A Level Physics:復習筆記5.25 Diffraction
Diffraction Diffraction is the?spreading out?of waves when they pass an obstruction Diffraction through a gap This obstruction is typically a narrow gap (a slit, or aperture) Diffraction is usually...
Edexcel A Level Physics:復習筆記5.24 Plane Polarisation
Plane Polarisation Transverse waves can oscillate in any plane perpendicular to the direction of motion (and energy transfer) of the wave Such waves are said to be?unpolarised Polarisation?occurs w...
Edexcel A Level Physics:復習筆記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:復習筆記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:復習筆記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:復習筆記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: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 ...
