Purpose:
The purpose of this experiment is to measure the thickness of a human hair by applying Young's double slits experiment.
Experiment:
The setup of the experiment is as follow
 |
| A strand of hair is used as the slit |
 |
| Experiment setup |
Using laser with wavelength of 660nm, interference pattern is projected onto a white board.
 |
| Interference Pattern |
After some measurement, the thickness of the hair can be calculated as follow
 |
| Calculation of thickness of the hair |
L = distance between the card and the white board
d = width of the slit
We then tried to verify this value by measuring the thickness of the same hair using a micrometer.
Thickness of hair according to micrometer: 50 ± 20μm
Conclusion:
The Young's double slit experiment can successfully be used to measure the thickness of human hair. Although the calculated value and the value measured using micrometer differ by 65%, the calculated value still falls within the uncertainty range.
We then tried to verify this value by measuring the thickness of the same hair using a micrometer.
 |
| Measuring the thickness using a micrometer. |
Conclusion:
The Young's double slit experiment can successfully be used to measure the thickness of human hair. Although the calculated value and the value measured using micrometer differ by 65%, the calculated value still falls within the uncertainty range.
No comments:
Post a Comment