What is missing??
What is missing??
What is missing??
What is missing??
What is missing??
What is the Law of Reflection??
On a smooth plane, the angle of incidence is equal to the angle of reflection.
What is missing??
What is missing??
What is missing??
What is missing??
What is missing??
Why does refraction occur??
Because the wave changes speed when it passes from medium to another.
What is partial reflection??
A slight reflection off a surface that a wave is refracted through.
If a wave speeds up when it passes into a new medium, what happens to the angle of refraction??
It increases.
If a wave slows downwhen it passes into a new medium, what happens to the angle of refraction??
It decreases.
2021-03-04
What happens to the wavelength of a wave if it speeds up when being refracted??
It increases.
What happens to the wavelength of a wave if it slows down when being refracted??
It decreases.
What happens to the wavelength of a wave if it bends away from the normal when being refracted??
It increases.
What happens to the wavelength of a wave if the angle of refraction decreases when passing into a new medium??
It decreases.
What happens to the wavelength of a wave when it is reflected??
It stays the same.
How can the frequency of a refracted wave stay the same if the wavelength changes??
The wave speed changes to compensate.
What happens to the speed of a water wave in deep water??
It increases.
2021-04-28
What is the formula for the refractive index $n$ given the speed of light in a vacuum $c$ and the speed of light in the material $v$??
$$ n = \frac{c}{v} $$
What is Snell’s Law??
$$ n_1 \sin \theta_1 = n_2 \sin \theta_2 $$
What’s the typical range for refractive indicies??
$$ 1 \to 2.5 $$
Informally, what does the refractive index of a material tell you??
How much you divide the speed of light by to get the speed inside the material.
2021-05-11
What is the formula for the refractive index $n$ of a material in terms of its critical angle $c$??
$$ n = \frac{1}{\sin c} $$
2021-10-09
Why is Snell’s law $$n_1 \sin\theta_1 = n_2 \sin\theta_2$$ a lie??
Because $n$ is actually a function of wavelength $n(\lambda)$.
Why is the refractive index of a material actually a function of the wavelength, $n(\lambda)$??
Because different wavelengths of light travel at different speeds.
Backlinks
- [[Physics - Intensity]]S
- [[Physics - Polarisation]]S
- [[Physics - Diffraction]]S
- [[Physics - Syllabus]]S
Metadata
date: 2021-02-25 11:20
tags:
- '@?school'
- '@?physics'
- '@?waves'
- '@?year-1'
- '@?public'
title: Physics - Reflection and Refraction
Attachments
- reflection-no-incident-angle.jpg
- reflection-no-incident.jpg
- reflection-no-normal.jpg
- reflection-no-reflection-angle.jpg
- reflection-no-reflection.jpg
- reflection.jpg
- refraction-no-emergent.gif
- refraction-no-incident-angle.gif
- refraction-no-incident.gif
- refraction-no-refraction-angle.gif
- refraction-no-refraction.gif
- refraction.gif
