The laws of reflection.

Slides:

Advertisements

Similar presentations

The bouncing off of light as it hits a surface

Advertisements

Topic 2 : Reflection. Essential Learning Outcome I can use the geometric ray model and the law of reflection to describe and predict angles of reflection.

Reflection & Mirrors SWBAT-Explain how light is reflected from rough and smooth surfaces.

Optics Lesson 4 Reflection In Curved Mirrors

Introduction to Ray Diagrams How to draw them for Curved Mirrors (please view this slide show in presentation view by pressing F5)

Light, Mirrors, and Lenses O 4.2 Reflection and Mirrors.

Concave Mirrors LG: I can describe the uses of concave mirrors and draw ray diagrams to show how images are reflected in concave mirrors.

Types of mirror When we draw a ray diagram we represent a mirror by drawing a line with dashes on the silvered (non-shiny) side. Most mirrors are flat.

Characteristics & Ray Diagrams

OBJECTIVE At the end of this lesson, you should be able to: –Describe the characteristic of the image formed by reflection of light. –Solve problem involving.

Sec  Review of Law: the angle of reflection is equal to the angle of incidence  We use ray diagrams to show how light rays change direction when.

Reflection & Mirrors. Reflection The turning back of an electromagnetic wave (light ray) at the surface of a substance. The turning back of an electromagnetic.

Reflection of Light. Reflectance u Light passing through transparent medium is transmitted, absorbed, or scattered u When striking a media boundary, light.

Why we see images in mirrors Or… The angle of reflection is equal to the angle of incidence.

Reflection Regular reflection occurs when parallel light rays strike a smooth surface and reflect in the same direction. Diffuse reflection occurs when.

2-3 Reflection and Refraction

Reflection Regular reflection occurs when parallel light rays strike a smooth surface and reflect in the same direction. Diffuse reflection occurs when.

Optics Mirrors and Lenses. Topics for Optics Reflection of LightReflection of Light –Law of Reflection –Plane Mirrors –Concave Mirrors –Convex Mirrors.

1 Reflection and Mirrors Chapter The Law of Reflection When light strikes a surface it is reflected. The light ray striking the surface is called.

Mirrors. What is a plane mirror? ● Its a plain mirror! (But called a plane mirror...) ● Its a FLAT and SMOOTH mirror, like many in your home. ● The reflection.

Unit 3 Lesson 3 Mirrors and Lenses

By the end of today, IWBAT…

Lesson P4 Part 1 ~ Mirrors & Reflection

Light, Mirrors, and Lenses

Light You will need 10 index cards.

Web Link: Reflection, Refraction & Diffraction

Reflection of Light By the end of this lesson, you will be able to…

OK everyone get ready to learn a new vocabulary term.

Why is not me?.

Reflection of Light Definition of Reflection Types of Reflection

Concave Mirrors SNC2D1 Mr. Findlay.

REFLECTION THE BOUNCING OF LIGHT.

YR9 Science: Light Properties of light Reflection Colours Refraction

Ch. 22 Sec. 3 Reflection & Mirrors

Curved Mirrors There are concave mirrors that are curved inward

Plain Mirror Style SNC2D

4.4 Concave and Convex Mirrors

Images on a Plane Mirror

Millions of light rays reflect from objects and enter our eyes – that’s how we see them! When we study the formation of images, we will isolate just a.

Reflection of Light from Spherical Mirrors

Learning goals We are learning the types of reflection.

Learning goals We are learning the types of reflection.

Law of Reflection θ(i) = θ(r) θ(i) θ(r)

Millions of light rays reflect from objects and enter our eyes – that’s how we see them! When we study the formation of images, we will isolate just a.

REFLECTIONS of PLANE AND SPHERICAL MIRRORS

Lesson P4 Part 1 ~ Mirrors & Reflection

Waves may reflect diffusely based on…

Light Reflection – the “bouncing” of light off of a surface. The light does not pass through the surface (called a medium), Refraction – is the “bending.

Reflection from mirrors

Lesson 2: Reflection and Mirrors Essential Questions:

Science 8 – Mirrors and Lenses ANSWERS

Reflection Physics Chapter 18a.

KS4 Physics Reflection.

Why we see images in mirrors

Lesson 15 Key Concepts and Notes

The Law of Reflection Smooth, shiny surfaces allow you to see an image. The angle of incidence=the angle of reflection Incident ray and reflective ray.

The Reflection of Light

Types of mirror When we draw a ray diagram we represent a mirror by drawing a line with dashes on the silvered (non-shiny) side. Most mirrors are flat.

Using Mirrors to Form Images

Optics: Reflection, Refraction Mirrors and Lenses

Physics 1161 Prelecture 16 Reflection of Light

Unit 3 Lesson 3 Mirrors and Lenses

LIGHT AND SOUND YEAR 9 SCIENCE

Presentation transcript:

The laws of reflection

Plane (flat) mirror Reflection

Lots of spectacular and beautiful effects are caused by the reflection of light. Reflections occur when light bounces off the surface of water or some other smooth surface into your eyes.

The laws of reflection A ray of light striking a mirror is reflected as shown in the diagram

The laws of reflection Term Definition Angle of incidence The angle between the ray of light that hits the mirror and the normal. Angle of reflection The angle between the ray of light that is reflected off the mirror and the normal. Incident ray The ray shinning onto the mirror. Reflected ray The ray that bounces off the mirror. Normal A line that is drawn at right angle(90°) to the mirror.

The angle of incidence is equal to the angle of reflection. If the angle of incidence and the angle of reflection are measured using a protractor then we will always find that: ANGLE OF INCIDENCE = ANGLE OF REFLECTION The angle of incidence is equal to the angle of reflection.

Describe light reflection from plane mirror. From the last lesson You should be able to... Describe light reflection from plane mirror. Describe images in plane mirrors.

Describe images in curved mirrors. From today’s lesson You should be able to... Describe images in curved mirrors.

This is a concave mirror. Concave means curved inwards like a cave.

Light reflection of curved mirror Principal axis Curved mirror

Light reflection of curved mirror Two parallel light rays hit a concave mirror

Light reflection of curved mirror These light rays reflect off the mirror

Light reflection of curved mirror These light rays reflect off the mirror

Light reflection of curved mirror These reflect off the mirror and meet at a point called focus.

Light reflection of curved mirror These reflect off the mirror and meet at a point called focus.

Light reflection of curved mirror Focal length is the distance of the focus from the mirror’s reflecting surface.

Light reflection of curved mirror Reflected ray Incident ray

Light reflection of curved mirror Incident ray Reflected ray

What would happen if we place the light source at the focus of a concave mirror?

When a light source is placed at the focus of a concave mirror. Light at focus

Parallel light rays

This is why concave mirrors are used as reflectors in torches, car headlights and floodlights.