Definition of Dispersion
Dispersion is the
separation of white
light into a spectrum
by the process of
refraction.
The cause of dispersion
• Dispersion occurs because different colours
of light travel at slightly different speeds
through...
Here is a glass
prism:
A ray of white light arrives
It is (mainly) reflected or refracted ?
away from or towards
the normal the normal
What happens to the ray of light?
But d...
In fact, the ray is :
• (bent through an angle), anddevi ated
• dispersed (split up into separate colours)
like this.
What happens now?
R
V
screen
Red is deviated most / least ?
Violet is deviated most / least ?
least
most
R
V
screen
There is a spectrum
on the screen:
Red Orange Yellow Green Blue Indigo Violet
ROY G BIV
What is the real difference
between red and violet light ?
4
10 000
mm
violet
wavelength
red
7
10 000
mm
The rainbow
An example of dispersion
caused by water
5 dispersion
Upcoming SlideShare
Loading in...5
×

5 dispersion

701

Published on

Published in: Technology, Business
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
701
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
46
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide
  • Convection
  • Convection
  • 5 dispersion

    1. 1. Definition of Dispersion Dispersion is the separation of white light into a spectrum by the process of refraction.
    2. 2. The cause of dispersion • Dispersion occurs because different colours of light travel at slightly different speeds through transparent substances. • In glass, perspex and water red travels quickest, violet slowest.
    3. 3. Here is a glass prism: A ray of white light arrives
    4. 4. It is (mainly) reflected or refracted ? away from or towards the normal the normal What happens to the ray of light? But different colours are refracted by different angles.
    5. 5. In fact, the ray is : • (bent through an angle), anddevi ated • dispersed (split up into separate colours) like this.
    6. 6. What happens now? R V screen Red is deviated most / least ? Violet is deviated most / least ? least most
    7. 7. R V screen There is a spectrum on the screen: Red Orange Yellow Green Blue Indigo Violet ROY G BIV
    8. 8. What is the real difference between red and violet light ? 4 10 000 mm violet wavelength red 7 10 000 mm
    9. 9. The rainbow An example of dispersion caused by water
    1. A particular slide catching your eye?

      Clipping is a handy way to collect important slides you want to go back to later.

    ×