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Telescope, Compass & Survey Tools
2 Products availableLaboratory Apparatus
2 Products availableLaboratory Equipments
1 Products availablePhoto Meters
1 Products availableOptical & Laser Instruments
1 Products availableSpectrometers
1 Products availableSpectrometer is an instrument used to study the spectra of a material as well as to find its refractive index also. This is done by producing spectral lines and after that, wavelengths and intesities can be measured.
Sigma Spectrometers stand on top when it comes to quality, accuracy and workmanship. Our Spectrometers are exclusively provided with a buil in light system to read the Vernier scale. The light system in our Spectrometers is unique in its class and adequate in terms of illumination, enabling the user to read the Vernier scale easily. Our Spectrometers are checked tested and aligned in such a way that the optic axis of collimator and telescopes pass through the vertical line in the center of the prism table through the same point at all positions of the telescope.
lb photometer is used to compare the intensities of two light sources. This is achieved by using a combination of specially made prisms knows as lummer brodhun cube. Lb photometer consists of a box that is made totally dark from inside and the prism cube is fitted inside this box along with right angled prisms in a very symetrical fashion.
light entering from the openings of the box strike the right angled prisms and passes through a right angle and falls on the prism cube.
our lb photometer is best in its class and precisely developed. We use custom made right angled glass prisms whose opposite sides are made convex by grinding and then pressing against eachother in a special brass enclosure known as the brodhun cube. With precise, carefull machining and proper design, our lb photometer is totally capable of performing the light intensity experiments very accurately.
technical specifications
Millikans oil Drop Apparatus is used to measure the Elementary Electric Charge. To achieve this, tiny charged droplets of oil are finely sprayed into two metal electrodes placed horizontally. Heavier drops tend to fall downwards fastly due to their thermal velocity but the lighter ones remain almost steady inside the metal electrode condenser chamber. An adjustable electric voltage is applied between the metal electrode plates which creates an electric field inside the condenser chamber. By adjusting the electric voltage, drops can be moved upwards or downwards according to their charge.
In the original design of Millikans oil drop apparatus, it was not easy to locate the oil drops in the condenser because the setting was critical. Therefore, keeping this thing into consideration, we made some improvements in the original design of this instrument, hence, making it user and student friendly.With just minor settings, Sigma Millikans Oild Drop Apparatus is capable of producing bright and large number of oil drops can be seen in the condenser enabling the students to perform the experiment withgreat accuracy and comfort.
Technical Specifications
When Light is reflected between a spherical surface and an adjacent touching flat surface, an interference pattern is formed. This phenomenon is called Newtons Rings. The apparatus required to view this interference is called Newtons Rings Apparatus.
In Newtons Rings Apparatus, the light from the Condenser lens incidents on the plane glass inclined at 45 degrees and gets reflected vertically downwards and falls on thecombination of palno convex lens and plain glass. Some portion of the light is reflected from the lower convex side of the lens and some portionof light is reflected from the upper side of the plain glass plate. A phase difference is created between the two wave fronts that gives riseto dark and bright concentric rings which are viewed through the microscope provided with a high quality Achromatic objective, a Ramsdons eyepieceand a cross line graticule. The diameter of the rings can be measured using the micrometer.
Sigma Newtons Rings Apparatus is compact in design; consists of a heavy cast iron base with 2 levelling screws. This base carries a 4x4 steel box in which the sodium lamp is suspended from a rectangular aluminium top.
Technical Specifications