The Ray Model of Light - WordPress.com

The Ray Model of Light - WordPress.com

11.4 The Ray Model of Light Light Ray A line and arrow representing the direction and straight-line path of light

Incident Light Light emitted from a source that strikes an object Incident

Light Ray Properties of Light When light strikes matter, it can be 1. Transmitted light passes through a substance 2. Reflected light bounces off an object

3. Absorbed light is absorbed by object and converted to heat Flat/Plane Mirrors Image:

A reproduction of an original object that is produced through the use of light Mirror A polished surface reflecting an image

Mirrors Terminology of Reflection Terminology of Reflection NORMAL

Terminology of Reflection NORMAL Incident Ray Terminology of Reflection NORMAL

Angle of incident Incident Ray Terminology of Reflection NORMAL Angle of

incident Incident Ray Reflected Ray Terminology of Reflection NORMAL

Angle of incident Incident Ray Angle of reflection Reflected Ray

11.6 Laws of Reflection: Plane (flat) mirrors Matter can be classified as:

Transparent Transmits all or almost all incident light, object can clearly be seen through material Ex. Clear glass

Matter can be classified as: Translucent

transmits some incident light but absorbs or reflects the rest, objects are not clearly seen through material Matter can be classified as: Opaque

Does not transmit any incident light, objects are not seen through material Try this: Classify each of these materials as transparent,

translucent or opaque: A textbook Frosted glass

A single sheet of tissue paper A clean sheet of glass

A rock Apple juice

Sunglasses Try this: Classify each of these materials as transparent, translucent or opaque:

A textbook- OPAQUE Frosted glass- TRANSLUCENT A single sheet of tissue paper- TRANSLUCENT

A clean sheet of glass- TRANSPARENT A rock- OPAQUE

Apple juice- TRANSLUCENT Sunglasses- TRANSPARENT From our lab, we

learned angle of incidence = angle of reflection The incident ray, reflected ray and the normal all lie in the same plane

Light Reflecting off Surfaces Specular Reflection: Reflection of light off a smooth surface (ex. mirror)

Light Reflecting off Surfaces Specular Reflection: Reflection of light off a smooth surface (ex.

mirror) Light Reflecting off Surfaces Diffuse Reflection:

Reflection of light off a rough surface (ex. moving water) Light Reflecting off Surfaces Diffuse Reflection:

Reflection of light off a rough surface (ex. moving water) Images in Plant Mirrors Pg 488- Leonardo da Vincis handwriting

Virtual Images An image formed by light coming from an apparent light source Light is not arriving at or coming from the actual image

location Characteristics of Images in a Plane Mirror Lateral Inversion:

The orientation of an image in a plane mirror that is backwards and in reverse order Reflection Worksheet Complete the worksheet

Remember that the virtual image must be the same difference from the mirror as the real object How do we see the image? Properties of an Image

Use the acronym SALT Sample Question Sample Question Sample Question

S- same size A- upright

L- 2 cm from mirror T- virtual

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