Balmer Series And Rydberg Constant
Project Information
- Category: HIGHER EDUCATION LAB EQUIPMENT
- Sub Category: PHYSICS LABORATORY
- Model Number:
- Category: HIGHER EDUCATION LAB EQUIPMENT
Description
Principle and Working:
- Hydrogen atoms in a discharge lamp emit a series of lines in the visible part of the spectrum. This series is called the Balmer series which continues into the ultraviolet range. Rydberg generalized the Balmer's formula in terms of wave numbers to describe wavelengths of spectral lines of many chemical elements. For hydrogen the Balmer's formula becomes a special case of Rydberg's formula and is given by
- 1/λ=R(1/2^2 - 1/n^2) where n are integers, 3, 4, 5, ... up to infinity and R is Rydberg constant (R = 4/B where B is the Balmer's constant). In the present setup, the spectral lines of hydrogen is observed by means of diffraction grating. The wavelength of the visible lines of Balmer series of hydrogen are measured by spectrometry.
Scope Of Learning:
- To Study Hydrogen Spectrum And Determination Of Rydberg's Constant With The Help of Spectrometer Diffraction Grating and Hydrogen Discharge Tube
- To determine the wavelengths of Balmer series in the visible region from hydrogen emission.
Technical Details
ABOUT SPECTROMETER:
✓ Scale: Brass, Dia. 175mm.
✓ Objective: Achromatic lens, f = 178mm, Aperture 32mm
✓ Slit: German silver with knurled screw
✓ Reticle: 900 cross etched on glass
✓ Least count: 20 seconds
✓ Eyepiece: 15X, Ramsden eyepiece
✓ Vernier: 4 verniers (Telescope & Prism table)
✓ Base: 220mm dia., Aluminium Casting
REQUIRED ACCESSORIES:
Apparatus Supply:
- Spectrometer
- Grating 15000 LPI
- Spirit Level 2"
- Working Manual
Accessories (Light Source):
- Hydrogen Discharge Tube
- Power Supply (Extra High Tension)
Clients
We are making Labs affordable and accessible to all. We provide complete 360-degree labs solution starting from designing the labs, consulting, and supplying required lab equipment, installing, and training of equipment. We have served more than 1000+ institutes across India making more than 1800+ laboratories. Our clients include DRDO, NITs, POLYTECHNICs, INDUSTRIAL TRAINING INSTITUTES, KENDRIYA VIDYALAYJNV, The Bhawanipur education society, State Autonomous Medical college Shahjahanpur, ONGC & many more.
