Reflection

The law of reflection is introduced as we learn about the difference between specular and diffuse reflection and discover the difference between real and virtual images.

Unit 6 Segment K: Reflection The law of reflection is introduced as we learn about the difference between specular and diffuse reflection, and discover the difference between real and virtual images.

Premiere Date: July 31, 2018 | Runtime: 00:05:52

## Learning Objectives

-Compare and contrast specular reflection and diffuse reflection.

-Define and use the law of reflection conceptually and mathematically.

-Experiment with a plane mirror noting the location of the image formed and whether it is real or virtual.

## Toolkit

Note-Taking Guide and Questions to Consider
Practice Problems
Examining the Law of Reflection Lab

## Vocabulary

diffuse reflection - when light rays strike a rough surface.

law of reflection - this law states that the angle of the incident ray equals the angle of the reflected ray.

reflection - when a wave bounces off a surface when interacting with a material.

specular reflection - when light is reflected off of a shiny or glossy surface.

## Georgia Standards of Excellence

SP4Obtain, evaluate, and communicate information about the properties and applications of waves.

SP4.dPlan and carry out investigations to characterize the properties and behavior of electromagnetic waves. (Clarification statement: Properties of waves include, but not limited to, amplitude, frequency, wavelength, and the relationship between frequency or wavelength and the energy of the wave.)

SP4.ePlan and carry out investigations to describe common features of light in terms of color, polarization, spectral composition, and wave speed in transparent media. • Analyze experimentally and mathematically aspects of reflection and refraction of light waves and describe the results using optical ray diagrams. • Perform calculations related to reflections from plane surfaces and focusing using thin lenses.

SPS9Obtain, evaluate, and communicate information to explain the properties of waves.

SPS9.cDevelop models based on experimental evidence that illustrate the phenomena of reflection, refraction, interference, and diffraction.

S8P4Obtain, evaluate, and communicate information to support the claim that electromagnetic (light) waves behave differently than mechanical (sound) waves.

S8P4.dDevelop and use a model to compare and contrast how light and sound waves are reflected, refracted, absorbed, diffracted, or transmitted through various materials. (Clarification statement: Include echo and how color is seen but not interference and scattering.)

## Request Teacher Toolkit

The Physics in Motion teacher toolkit provides instructions and answer keys for study questions, practice problems, labs for all seven units of study.  GPB offers the teacher toolkit at no cost to Georgia educators. It will be available in September 2018. To preorder your teacher toolkit, complete and submit this form to request the teacher toolkit. You only need to submit this form one time to get materials for all seven units of study.