Sheena Grace Bitgue - Ray Model of Light and Laws of Reflection Worksheet PDF

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Science Grade 10...

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Name: THE RAY MODEL OF LIGHT & THE LAWS OF REFLECTION WORKSHEET SECTION 11.4 – THE RAY MODEL OF LIGHT Define each of the following: Term Definition Light ray

A line on a diagram representing the direction and path that light is travelling.

Geometric optics

The use of light rays to determine how light behaves when it strikes an object.

Incident light

Light emitted from a source that strikes an object.

Matter is classified into three categories, based on how it behaves when the light strikes it. These categories (or types of media) are: Media Definition Examples When a material transmits all or almost all incident light; objects can be ● Air ● Clear glass clearly seen through the material. ● Water

Transparent

When a material transmits some incident light but absorbs or reflects the rest; objects are not clearly seen through the material.

Translucent

● Frosted glass ● Quartz ● Wax paper

When a material does not transmit any incident light; all incident light ● Cardboard is either absorbed or reflected objects behind the material cannot be seen● Wood ● Metal at all.

Opaque

Flat Mirrors – Define the following terms: Term

Definition

Image

Reproduction of an object through the use of light.

Mirror

Any polished surface reflecting an image.

Reflection

The bouncing back of light from the surface.

Terminology of Reflection – Write the term that is being described in each definition: Term Definition A flat mirror

Plane mirror

Normal

The perpendicular line to a mirror surface, which is drawn at the point where the incident ray strikes the surface of the mirror

Incident ray

The incoming ray that strikes the surface of the mirror

Reflected ray

The ray that bounces off the reflective surface

Angle of incidence

The angle between the incident ray and the normal

Angle of reflection

The angle between the reflected ray and the normal

Name: Label the following diagram with the terms from the "Terminology of Reflection" Table. List the terms in the table below the diagram.

Letter on Diagram A (reflective surface) B C D E F

Term reflective surface normal incident ray reflected ray angle of incidence angle of reflection

SECTION 11.6 – THE LAWS OF REFLECTION State the two laws of reflection: Law 1

The angle of incidence equals the angle of reflection.

Law 2

The incident ray, the reflected ray, the normal all lie in the same plane.

Reflecting Light Off Surfaces – Define the following terms: Terminology Definition Specular reflection is the reflection of light off a smooth , shiny surface. Specular Reflection

Diffuse Reflection

Diffuse reflection of light off an irregular or dull surface....