Young’s Single Slit (Adjustable)

The adjustable single slit diffraction apparatus is an educational optics instrument used for demonstrating the diffraction of light through a narrow aperture. Designed for senior-secondary, college and university physics laboratories, it allows learners to observe how changing the slit width affects the width, intensity and distribution of a diffraction pattern.

Product Description

The STEMAids Young’s Single Slit (Adjustable) supports practical study of Fraunhofer single-slit diffraction. When monochromatic light passes through a sufficiently narrow slit, the light spreads and forms a central bright maximum with weaker secondary maxima on either side.

The adjustable aperture enables students to compare diffraction patterns at different slit settings. This makes the apparatus useful for explaining the relationship between slit width, wavelength, screen distance and diffraction angle. The exact slit-width range, construction material and mounting arrangement should be confirmed before procurement because these values are not currently published.

Laboratories can pair the slit assembly with a compatible helium-neon laser for optics experiments, subject to wavelength, power and mounting requirements.

Key Features

• Adjustable slit aperture: Allows users to vary the slit opening and compare the resulting diffraction patterns.
• Visible wave-optics demonstration: Shows the spreading of light and the formation of central and secondary maxima.
• Quantitative experiment support: Enables calculations involving slit width, wavelength, screen distance and diffraction angle.
• Hands-on optical alignment: Develops practical skills in positioning a light source, slit and projection screen.
• Reusable teaching apparatus: Suitable for repeated demonstrations and supervised laboratory practicals.
• Curriculum-relevant learning: Supports lessons on diffraction, wavefront propagation and the wave nature of light.
• Variable-pattern observation: Helps students see that a narrower slit generally produces a wider diffraction pattern.

Technical Specifications

What’s Included in the Kit

• Adjustable single-slit assembly
• Holder or support arrangement
• Light source
• Projection screen
• Experiment instructions

Confirm the final supply scope through the STEMAids sales and institutional enquiry team before placing an order.

Applications / Uses

• Demonstrating diffraction of monochromatic light through a narrow slit.
• Observing the broad central maximum and weaker secondary maxima.
• Investigating how slit width changes the diffraction-pattern width.
• Estimating slit width when the wavelength and experimental geometry are known.
• Teaching diffraction minima, intensity distribution and wave propagation.
• Conducting senior-secondary, undergraduate and teacher-training practicals.
• Supporting optics demonstrations, science exhibitions and laboratory workshops.

How to Use the Young’s Single Slit (Adjustable)

1. Mount the single-slit apparatus securely on a stable holder or optical bench.
2. Position a suitable monochromatic light source so that the beam falls normally on the slit.
3. Place a white projection screen behind the slit at a measured distance.
4. Reduce ambient light so that the diffraction pattern is clearly visible.
5. Align the source, slit and screen until a symmetrical central maximum appears.
6. Adjust the aperture gradually and observe the change in the pattern width.
7. Measure the required distances when calculating slit width or diffraction angle.

Safety note: Never look directly into a laser beam or direct it toward another person. Use laser sources only under trained supervision. Do not touch the slit opening or force the adjustment mechanism.

Care & Maintenance

• Remove loose dust with a soft optical brush or clean, dry air.
• Keep fingers, liquids and abrasive cleaning materials away from the slit.
• Store the apparatus in a dry, covered container when it is not in use.
• Operate the adjustment mechanism gently and protect the assembly from impact.

Why Choose STEMAids

STEMAids is the educational science brand of Eduscope Smart Learning Solutions Private Limited, a New Delhi–based manufacturer of laboratory learning products, STEM kits and educational models. The company supports individual, institutional, bulk and tender-based procurement. It also holds an Importer-Exporter Code for international supply. Product-specific dimensions, accessories and documentation should be verified when requesting a quotation.

Frequently Asked Questions

What is an adjustable single slit apparatus used for?

It is used to demonstrate light diffraction and investigate how changing the width of a narrow slit affects the resulting diffraction pattern.

What pattern does a single slit produce?

A single narrow slit produces a broad central bright maximum with weaker secondary maxima separated by dark minima.

How does slit width affect diffraction?

A narrower slit generally produces a wider diffraction pattern. A wider slit produces a narrower pattern when the wavelength and screen distance remain unchanged.

Can this apparatus be used to measure slit width?

Yes. Slit width can be estimated from the wavelength, screen distance and measured position of the diffraction minima.

Is a laser supplied with the single slit?

The available product information does not confirm that a laser is included. Verify the complete supply scope before ordering.

Is the apparatus suitable for school laboratories?

It is suitable for supervised senior-secondary demonstrations and for college or university optics practicals. Laser safety procedures must be followed whenever a laser source is used.