Download presentation
Presentation is loading. Please wait.
1
Properties of Waves Properties of Waves
2
Reflection When light reflects off a mirror the angle of incidence always equals the angle of reflection Reflection
3
Reflection Reflection
4
Reflection Reflection
5
Reflection Reflection
6
This change in direction is known as refraction.
When light enters a denser transparent substance it slows down and changes direction. This change in direction is known as refraction. Refraction
7
Refraction Refraction
8
Refraction Refraction
9
Refraction Refraction
10
Convex and Concave lenses
Refraction
11
Different colours of light are refracted by different amounts.
Dispersion When white light enters a prism it is split into a spectrum. This is known as dispersion Different colours of light are refracted by different amounts. Red light refracts the least, violet light refracts the most Dispersion
12
Dispersion Dispersion
13
Dispersion Dispersion
14
Reflected Colours Reflected Colours
15
Colour Filters Refraction
16
Total internal reflection
When a ray of light travels from glass into air some of the light is reflected from the boundary If the angle of incidence is greater than the critical angle then all the light is reflected inside the glass. This is called Total Internal Reflection. Optical fibres use total internal reflection Total internal reflection
17
Total internal reflection
18
Total internal reflection
19
Total internal reflection
20
Endoscope Endoscope
21
The closer the gap to the wavelength, the greater the diffraction
Diffraction occurs when waves spread out after passing through a small gap. The closer the gap to the wavelength, the greater the diffraction Diffraction causes; sound to be heard in the shadow of buildings radio signals to be heard in the shadow of hills Diffraction
22
Diffraction Diffraction
23
Diffraction Diffraction
24
Diffraction Diffraction
25
Quiz Quiz
26
Wordsearch Wordsearch
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.