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# Refraction

## When light passes from one material to another it can change its angle of travel based on the new material.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Refraction

Students will learn why light refracts when entering different substances like water, glass, etc. and how to calculate the angle of refraction using Snell's Law.
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## Refraction of Light

Considers the refraction of light, Snell’s Law, the index of refraction, and angles of incidence and refraction.
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## Refraction and Lenses

by Mitsi Nessa //basic
Refraction of light in matter and how light changes its speed and angle of refraction according to the type of medium it is travelling through. What a lens is and what it does, concave and convex lenses.
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• Interactive Simulations

## Least Time

Understand why a ray of light passes from one point to another in such a way that the time taken is a minimum which indeed results in the law of refraction.
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• Interactive Simulations

## Diamond Cut

Learn about refraction, reflection, and total internal reflection in the context of a light ray passing into and out of a diamond.
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• PLIX

## Color: Light in a Prism

Refraction Interactive
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• PLIX

## Refraction: Light Entering Water

Refraction Interactive
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• PLIX

## Refraction Slider

Refraction Interactive
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• PLIX

## Band Gap

Refraction Interactive
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• Video

## Snell's Law

Explains Snell's Law and how to solve a standard physics Snell's law problem.
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• Video

## Refraction

Provides a thought experiment to explain refraction.
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• Video

## Rainbows

The physics of rainbows are explained.
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• Video

## Geometric Optics 5: Refraction - Overview

by CK-12 //basic
Overview
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• Video

## Geometric Optics 5: Refraction - Example 2

by CK-12 //basic
Predicting a sequence of refracted rays based on indices of refraction
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• Video

## Geometric Optics 5: Refraction - Example 3

by CK-12 //basic
Solving problems involving the index of refraction, n using the equation n = c/v
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• Video

## Geometric Optics 5: Refraction - Example 4

by CK-12 //basic
Solving problems involving Snell's Law, n[1]sinθ[1] = n[2]sinθ[2]
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• Video

## Speed of Light in Glass

An explanation of how refraction works.
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• Video

## Geometric Optics 5: Refraction - Example 1

by CK-12 //basic
Identifying the incident ray, refracted ray, angle of incidence, and angle of refraction
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• Video

## Why is it Dark at Night?

Real world application of knowledge of scattering and refraction of light.
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• 0

## Refraction Quiz - PPB

Calculate index of refraction of different substances based on their angles of refraction, and vice versa. Explain why light looks bent when it travels through different media.
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## Refraction of Light Quiz

Reviews light refraction and Snell's law.
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• Critical Thinking

## Refraction Discussion Questions

A list of student-submitted discussion questions for Refraction.
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• Real World Application

## Prisms

by Mark Holmstrom //
There are a huge number of interesting areas where refraction shows itself in real life. (incomplete)
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• Real World Application

## Fish Hunting

Learn how to hunt fish using only a spear.
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• Real World Application

## Light Pipes

Discover how information is transmitted through light.
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• Study Guide

## Geometric Optics Study Guide

This guide looks at geometric optics: reflection, refraction, Snell's law, total internal reflection, ray diagram, real and virtual images, mirrors, and lenses.
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• Flashcards

## Refraction Flashcards

by CK-12 //basic
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• Flashcards

## Refraction of Light

by Kyle Bardman //basic