of light. their knowledge of mirrors and image in Securing reflection. a plane mirror. State the meaning of: diffuse, specular, incident ray, reflected ray. Explaining: Images in plane mirrors Use the ray model of light to explain Demonstrate the various properties of how a periscope works. an image in a plane mirror. The Use ray diagrams to explain the law of distance of the image behind the reflection and to describe the mirror can be demonstrated simply differences in light reflected from by laying a ruler at right angles to the smooth and rough surfaces. mirror, or use an object such as a Describe the characteristics of the pencil stuck in a piece of modelling image formed by a plane mirror and clay in front and behind the mirror. use ray diagrams to explain its formation. Plenary: Thinking about reflection Exceeding Odd One Out: incident ray, reflected State the meaning of: convex mirror, ray, normal. (Possible answers: concave mirror. normal is not a light ray; normal is Use ray diagrams to explain some of the only one that has a fixed the features of images in periscopes. angle.) What Was The Question: Working Scientifically specular. (Possible questions: What is Explain why internationally agreed the name for the type of reflection symbols and conventions are that happens in a mirror? Name the necessary in science communication. type of reflection where all the Interpret diagrams that use scientific reflected rays go in the same symbols and conventions. direction.) Lesson 8Jc: Refraction Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Refraction demonstrations Exploring: Resources n/a Show students Describe some uses of lenses. Show students some examples of Investigating from 8Jc some examples State the meaning of: refraction, refraction. For example, stand a pencil in lenses Exploring of refraction. angle of refraction, refracted ray, a beaker of water and ask students to Extended this by Science. convex lens, converging lens. describe the appearance of the pencil (it using a spherical Students use Recall that light, sound travels at appears bent). Then ask them to explain convex lens to ray boxes to different speeds in different the observed effects. form an image of shine parallel materials. a window or lamp rays of light
of light. Securing State the meaning of: diffuse, specular, incident ray, reflected ray. Use the ray model of light to explain how a periscope works. Use ray diagrams to explain the law of reflection and to describe the differences in light reflected from smooth and rough surfaces. Describe the characteristics of the image formed by a plane mirror and use ray diagrams to explain its formation. Exceeding State the meaning of: convex mirror, concave mirror. Use ray diagrams to explain some of the features of images in periscopes. Working Scientifically Explain why internationally agreed symbols and conventions are necessary in science communication. Interpret diagrams that use scientific symbols and conventions. their knowledge of mirrors and reflection. Explaining: Images in plane mirrors Demonstrate the various properties of an image in a plane mirror. The distance of the image behind the mirror can be demonstrated simply by laying a ruler at right angles to the mirror, or use an object such as a pencil stuck in a piece of modelling clay in front and behind the mirror. Plenary: Thinking about reflection Odd One Out: incident ray, reflected ray, normal. (Possible answers: normal is not a light ray; normal is the only one that has a fixed angle.) What Was The Question: specular. (Possible questions: What is the name for the type of reflection that happens in a mirror? Name the type of reflection where all the reflected rays go in the same direction.) image in a plane mirror. Lesson 8Jc: Refraction Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Describe some uses of lenses. State the meaning of: refraction, angle of refraction, refracted ray, convex lens, converging lens. Recall that light, sound travels at different speeds in different materials. Starter: Refraction demonstrations Show students some examples of refraction. For example, stand a pencil in a beaker of water and ask students to describe the appearance of the pencil (it appears bent). Then ask them to explain the observed effects. Exploring: Investigating lenses Extended this by using a spherical convex lens to form an image of a window or lamp Resources from 8Jc Exploring Science. n/a Show students some examples of refraction. Students use ray boxes to shine parallel rays of light