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  Home > Classroom Equipment > Advanced Physics Equipment >

Precision Fresnel Biprism Interference Apparatus
Precision Fresnel Biprism Interference Apparatus


 
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Precision Fresnel Biprism Interference Apparatus
Our Price: $2,339.00


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Product Code: 6189
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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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