Young Double Slit (Adjustable)

Quick answer: Young Double Slit (Adjustable) is a wave-optics apparatus for demonstrating the interference of light through Young’s double-slit experiment, with an adjustable configuration that lets students study how slit separation affects the bright-and-dark fringe pattern.

Product Description

The LabEquip Young Double Slit (Adjustable) supports Young’s double-slit experiment, a standard wave-optics activity used to demonstrate the interference of coherent light. When suitable monochromatic light passes through two closely spaced slits, the overlapping waves produce alternating bright and dark fringes on a screen.

The adjustable format allows the experimental configuration to be changed during demonstrations or practical work, helping students examine the relationship between slit separation, wavelength and fringe spacing. Exact slit-separation range, mount dimensions and materials are not stated in this listing; we have not invented these figures and recommend confirming them with our sales team before ordering.

Specifications

Suggested Procedure

• Mount the double-slit apparatus on an optical bench with a suitable monochromatic light source, such as a laser.
• Set an initial slit separation and observe the interference fringe pattern on a screen at a fixed distance.
• Adjust the slit separation and record how the fringe spacing changes.
• Compare results at several settings to relate slit separation to fringe spacing.
• Follow standard laser safety precautions if a laser source is used.

Care & Maintenance

• Keep the adjustable slit mechanism free of dust to maintain smooth, precise adjustment.
• Avoid touching the slit apertures directly with fingers.
• Store the apparatus in its case or a dry, dust-free location when not in use.
• Handle the adjustment mechanism gently to avoid damaging the fine slit assembly.

Why Choose LabEquip

LabEquip supplies physics, chemistry and biology lab equipment, STEM kits and science models for schools, colleges and institutional laboratories, with honest specifications and responsive sales support. For related wave-optics apparatus, see our Young’s Single Slit (Adjustable), Laser Ray Box, and Optical Spectrometer, or visit the LabEquip homepage to browse our full catalogue.

Frequently Asked Questions

What does Young Double Slit (Adjustable) demonstrate?

It demonstrates Young’s double-slit interference experiment, showing how overlapping light waves from two closely spaced slits form bright and dark fringes.

What slit-separation range is available?

The exact slit-separation range is not stated in this listing. Please confirm with our sales team before ordering.

What light source should I use with it?

A monochromatic light source, such as a laser, is typically used; please follow standard laser safety precautions when doing so.

How is this different from the single-slit apparatus?

This apparatus uses two closely spaced slits to demonstrate interference, while a single-slit apparatus demonstrates diffraction through one narrow aperture.

How should I maintain the adjustable slit mechanism?

Keep the mechanism free of dust, avoid touching the apertures directly, and store the apparatus in a dry, dust-free location when not in use.

Last Updated: September 2026