Soy sauce optics

1. Experimental setup
Distance between glasses - from 0.13 to 1mm
Clamping the glasses

Laser
Average power-
1 Watt
Soy lens
Current source
Picture
2. Experimental setup
Vertically position soy lens

Without lens
In the beginning with lens
After some time
1. First observations

The rings formed
2. First observations

Main point
Absorption

Qualitative explanation

Rays are deflected to the side with a large refractive index.
Due to thermal expansion of liquids:
Dispersive lens

Screen
Size of picture
F
After some time all soy sauce heating
No temperature difference
No change in the refractive index
Why image gets smaller?

Rays are different distances and changing the reflective index therefore there is a phase shift
Ring formation
Characteristically distance soy lens- scree

Mathematical model

The temperature distribution
Heat equation
T
r

Pasco
Light sensor

Refractometer - device measuring the refractive index of light
a
Coefficient- changing reflective index with the temperature

Program model
IMPORTANT!
Laser

Intensity distribution in the image
Area element

Theory VS practice
Zero position

Focal length
Refractive index without heating
coefficient of thermal conductivity

L
Experimental finding of focal length
F
R
a
h
From geometry:

Compeering

Parametric studies

With increasing current increases the image
The effect of laser current on image size

Image width from laser current

Optical power VS thickness of soy sauce

Density VS Temperature

Conclusion
Experimental setup. Laser with constant power
Qualitative explanation(different hitting soy sous , different phase of beam)
Temperature distribution and absorption coefficient
Theoretical formula for focal length and got method for experimental

Finding coefficient showing the change reflective index with temperature
Got comparing practice and theory and explain the errors
The dependents image width from laser current
Changing density with temperature

T
r
Qualitative graphs
n
r
In the center-maximum temperature and minimum refractive index

Освещенность

Laser 450 нм

Стекло 1,52

Перевод из люксов в СИ
* 5/7