Chapter 5 Mirror and Lenses

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Opal Hudson
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Light and Matter Transparent objects that light waves. Transluscent objects that transmit light waves. Objects are not seen through them.

1 Chapter 5 Mirror and Lenses Name: 5.1 Ray Model of Light Another model for light is that it is made up of tiny particles called. Photons travel in perfect, lines from a light source This model helps us to understand and predict light s, particularly with and. Light and Matter Transparent objects that light waves. Transluscent objects that transmit light waves. Objects are not seen through them. Opaque objects that or light waves. Shadows Ray diagrams can be used to explain Light from a light source is by an object, casting a shadow the object The of the shadow depends on the from the light source Reflection

2 When light bounces off an object, we say it The incoming ray is called the ray. The outgoing ray, that bounces off the object, is called the ray A dotted line can be drawn that is to the surface of the object; this is called the. The angle between the incident ray to the normal is the as the angle of the reflected to the normal. Refraction When light moves from air into glass, it slows down and changes because glass is than air. The angle of refraction is the angle a ray of light emerging from the between two materials and the normal. When light passes into more dense material, it bends the normal (and slows down) When light passes into less dense material, it bends from the normal (and speeds up)

$Refraction causes optical of objects under$ They often appear to be to the surface than

$are formed by the refraction of light as it$ On a hot day, air near the surface gets very

3 Refraction causes optical of objects under water. They often appear to be to the surface than they really are. are formed by the refraction of light as it passes from dense hot air to dense cool air. On a hot day, air near the surface gets very hot compared to the air above. Light traveling from the sky gets as it passes through the hot air, which then appears to eye to be pools of

4 5.2 Mirrors Reflection Mirrors and highly polished objects light. Law of Reflection of incidence = of reflection Images in a Mirror Plane Mirrors image appears the plane mirror and size image is sideways but not vertically

Concave Mirrors curve reflect light like a plane mirror, but reflected light rays meet at a single point called a point these light rays that come together are called rays Images formed in Concave

5 Concave Mirrors curve reflect light like a plane mirror, but reflected light rays meet at a single point called a point these light rays that come together are called rays Images formed in Concave Mirrors distant objects appear to be and upside down ( ) As you approach the focal point of the mirror, the object gets, but is still If an object is between the focal point and the mirror, the image is and. Uses for Concave Mirrors lights placed at the focal point will reflect out of the mirror in lines used in and make-up and shaving mirrors are concave so that your image is (making it easier to see)

6 Convex Mirrors curve reflect parallel light as if it were coming from a focal point the mirror since the light rays spread apart after hitting the mirror, they are called rays. Images in Convex Mirrors objects appear than they really are a view be seen than in a plane mirror of the same size Uses for Convex Mirrors mirrors in stores side-view mirrors in

7 5.3 Lenses Light as it passes through glass and then bends again as it passes back into air A lens is a piece of transparent material that bends light in a way Lenses can cause light rays to or as they pass through them Concave Lenses in the middle than at the edge Light rays or spread out as they pass through the lens Image formed is and than the actual object Uses for Concave Lenses some (near-sightedness) some in doors

at a point called the The distance from the focal point to the centre of the lens is the An object far away from

8 Convex Lenses in the middle than at the edge Light rays or come together as they pass through the lens Image formed depends on the of the object with respect to the mirror Focal Length in Convex Lenses light rays converge at a point called the The distance from the focal point to the centre of the lens is the An object far away from the lens appears (upside down) and An object close to the lens is and Uses for Convex Lenses: glass Overhead (long-sighted)

Chapter 5: Mirrors and Lenses. 5.1 Ray Model of Light

Chapter 5: Mirrors and Lenses. 5.1 Ray Model of Light Chapter 5: Mirrors and Lenses 5.1 Ray Model of Light Ray Model of Light Another model for light is that it is made up of 3ny par3cles called photons Photons travel in perfect, straight lines away from