Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436
Email flinn@flinnsci.com

Item #: AP8135

Price: $2,085.75

Ships directly from the manufacturer.

With the Precision Fresnel Biprism Interference Apparatus, capture the most accurate and the highest level of detail.

See more product details

This item can only be shipped to schools, museums and science centers

Product Details

Replicate Fresnel’s biprism experiment on a benchtop. This 1-meter-long optical bench requires less space than typical setups and can be used under dimmed lights. The bench includes adjustable supports for the slit, biprism, lens and eyepiece components. The micrometer eyepiece has a range of ±4.00 mm with a backlash-free easy-to-read drum scale and allows for fringe separation measurements to 0.01 mm. The fringes show good contrast and separation for dark–dark position measurements. A ground glass screen is used for easy alignment and adjustment so the two virtual point sources are parallel and of equal intensity. Confirm the wavelike nature of light by measuring fringe separation of overlapping sources.

Contents include:
• Optical bench
• Riders (lateral adjustment and plain)
• Sodium lamp, 20 W, 110 V
• Adjustable slit
• Biprism, eyepiece and eyepiece adapter ring
• Micrometer eyepiece and eyepiece adapter ring
• Ground glass screen
• Height fixing collar
• Biprism