Precision Fresnel Biprism Interference Apparatus
Product Code: 6189
Our Price: $2,339.00
Description
PLEASE NOTE: Advanced Physics Equipment is built-upon-order. We do not stock these items in house, but order them built when an order is placed. Build orders take approximately 90 days.
• Perform Fresnel's Biprism Experiment on a 1m optical bench
• Precision optics allow fringe position measurements to 1/100mm
• Easy alignment and adjustment of the two virtual light sources
Fresnel's Biprism Experiment is the fundamental example of common path interference by division of wavefront. Light from a slit passes through side-by-side prisms with very shallow angles to separate it into two almost parallel beams. When these beams are brought to overlapping by a convex lens, they interact as if they originated from two virtual sources side by side and generate equally-spaced fringes. The original version of the experiment by Fresnel is difficult to perform because it requires precise adjustment of the slit and prisms, a dark room, and a large amount of space to separate the fringes for easy viewing.
This apparatus allows these issues to be resolved by using a precision angle-adjustable slit, a prism carrier with both lateral and angular adjustment, and a micrometer eyepiece to allow fringe separation measurements to 1/100mm. The experiment can be carried out on a 1m optical bench with only dimmed lighting.
The micrometer eyepiece has a range of ±4.00 mm with a backlash-free, easy-to-read drum scale.
During setup, the two virtual sources are focused onto a ground glass screen for easy alignment and adjustment so that the sources are parallel and of equal intensity.
The fringes show good contrast and separation for dark-dark position measurements.
Contents:
1. Optical Bench, 1000mm . . . . . . . . . . . . . . . . . . . . .1
2. Riders, Lateral Adjustment . . . . . . . . . . . . . . . . . . . .2
3. Riders, Plain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
4. Sodium Lamp, 20W, 110V . . . . . . . . . . . . . . . . . . .1
5. Adjustable Slit . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
6. Biprism Carrier, Adjustable . . . . . . . . . . . . . . . . . . .1
7. Lens Carrier, Plain . . . . . . . . . . . . . . . . . . . . . . . . . .1
8. Eyepiece Carrier, Adjustable . . . . . . . . . . . . . . . . . .1
9. Micrometer Eyepiece . . . . . . . . . . . . . . . . . . . . . . . .1
10. Ground Glass Screen . . . . . . . . . . . . . . . . . . . . . .1
11. Eyepiece Adapter Ring . . . . . . . . . . . . . . . . . . . . .1
12. Height Fixing Collar . . . . . . . . . . . . . . . . . . . . . . .3
13. Biprism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
14. Lens, f = +150mm . . . . . . . . . . . . . . . . . . . . . . . .1
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