PARTICLE SIZE MEASUREMENT
DescriptionExp-1 Determination the wavelength of He-Ne laser using diffraction grating.
Exp-2 Determination the particle size of lycopodium powder.
Shine an expended He-Ne laser beam through a plate dusted with lycopodium powder to construct circular rings on the screen which are nearly spherical and have a very uniform average diameter. The quality of the ring depends on the evenness of dusting.
Wavelength of given laser source of light
Where
n - Order of diffraction
l - Wavelength of laser used in meter
D - Distance between glass plate and screen in meter
xn - Distance between central bright spot and the nth fringe in meter
Contents:
| Cat. No. | Item Name | Qty |
| R3891 | He-Ne laser | 1 |
| C1734 | Optical Bench | 1 |
| C1734 | Screen (30 x 30 cm) | 1 |
| SJ095 | Microscope slides set of 100 pcs. | 1 |
| SL745 | Diffraction grating | 1 |
| CD555 | Slit holder | 1 |
| C4737 | Slit (Blade) | 1 |
| SP124 | Measuring tape (3 m) | 1 |
| Lycopodium powder 50gm | 1 |