TWO BEAM INTERFERENCE
DescriptionExp-1 To determine the wavelength of monochromatic light source using Fresnel’s biprism.
Exp-2 To determine the wavelength of monochromatic light source using Fresnel’s mirror.
Principle and Working :
Fresnel's Biprism and Fresnel's Mirror can be used to create two Virtual coherent light sources and observe interference phenomenon. Monochromatic light in these experiments is produced by sodium light source or he-ne laser. The wavelength (λ) can be determined by the formula
λ = βd/D
where β is fringe width.
D is a distance between virtual source and screen or eyepiece.
d distance between two virtual source.
Contents:
| Cat No. | Item Name | SK005 | SN629 |
| SL435 | Fresnel biprism | 1 | 1 |
| SL885 | Universal lens holder (Biprism) | 1 | 1 |
| SL214 | Optical bench hexagonal | 1 | 1 |
| SL802 | Adjustable slit self centering | 1 | |
| SL930 | Sodium light source | 1 | |
| SL233 | Micrometer eyepiece | 1 | |
| SL756 | Convex lens in holder | 1 | 1 |
| SL436 | Transverse saddle | 1 | 2 |
| CD533 | Fresnel mirror | 1 | 1 |
| CD556 | Microscope objective in holder | 1 | |
| SO016 | Translucent screen | 1 | |
| SG110 | Cylindrical base | 1 | |
| SP142 | Vernier caliper | 1 | |
| SP124 | Measuring tape | 1 | |
| R3891 | He-Ne laser 2mW | 1 | |
| SL216 | Saddle |
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He-Ne Laser R3891
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