It is a simple device to determine the ultrasonic velocity in liquids the principle is based on accurate measurement of wave length in the medium Ultrasonic wave s of known frequency are produced by a quartz plate fixed at the bottom of the cell. The waves are reflected by a movalbe metallic plate. If the separation between these plates is exactly whole multiple of sound wavelength, standing waves are formed. The acoustic resonance gives rise to electrical reaction on the generator and anode current becomes maximum. From the knowledge of wavelength, velocity can be obtained.
To determine velocity of ultrasonic waves in a liquid, complete apparatus consists of high frequency R.F. Oscillator 3-8 MHz, Crystal with tank, long tube Spectrometer with 7 "protracted circle, sodium lamp with wooden box and transformer
A basic instrument for performing spectroscopy experiments, designed to give best possible results, mounted on stable cast iron base, protracted scale 150mm is divided on precision machine, vernier reading 1 min., telescope is fitted with 25mm dia. and 178mm focal length achromatic objective, 10x Ramsden eye piece and cross line graticule, collimeter has an adjustable precision slit of 6mm long jaws of non rusting metal, 8cm dia. prism/grating table is adjustable and has engraved ring pattern. Supplied in a beautiful plywood box with prism holder and grating holder
(Vernier Microscope) : Consists of cast iron base with machined V-shape vertical pillar, microscope tube consists of 10x eye piece and on achromatic objective of 50-75 mm working distance, embedded stainless steel horizontal scale is graduated upto 17cm and vertical scale 15cm, vertical and horizontal slide can be clamped at any position using clamping screw, fine motion is brought about be micrometer screws, horizontal and vertical vernier of 0.01mm are provide along with two levelling screws, packed in plywood box.
Same 1335 but provided with bi-quartz in place of half shade. Available : Closed / Open Model
Compact form with all the necessary arrangements for conducting Newton’ Ring experiment, a standard microscope until with 30x magnification and rotatable cross line, the microscope tube unit can be raised of lowered and can be clamped in any desired position, the Newton Ring set consisting of one plain and one plano convex lens placed in a metal case resting over the stage of the instrument which can be adjusted for the alignment and adjustable reflector plate is fitted in the required direction, a condenser lens is provided in front of reflector, supplied in beautiful storing cabinet
It consists of two identical units each with poloroid disc in a rotatable mounts, brass scales are divided into 3600 with least Count of 1 min
It is divided in two parts :(i) Mechanical,a) Bed : It is optically ground and stable.Lead Screw : It is also optically ground and stable.Optical Mirror Mount : Kinematic mirror mounts are provided to hold the mirror.(ii) Optical Part Beam Splitter : It is optically work with 2/10 surface flatness.b) Compensating Plates : Two plates are provided. Mirrors : 2 Nos mirror of focal length 25mm are provided
A simple and sensitive polarimeter designed on Laurent’s half shade system for accurate results, equipped with polariser, analyser and half wave mica plat, precisely graduated scale mounted on strdy tripod stand with provision of height adjustment, complete with 200 mm tube.Range of Measurement : 0 to 3600. Telescopic Magnification : 5x vernier accuracy : 0.10.
200mm long tube with bulb in the centre, packed in velvet box
Metal box wiht piano type on/off switch. Out put is through a 3 socket. The trnsformer is auto leak type and gives starting voltage of 440V which reduces itself when the lamp glows.Available : 35 / 55 wallt.
To demonstrate the phenomenon of interference of light using bi-prism and to understand the concept of interference, image formation width of fringes. It consists of 1 1/2 meter long stainless steel double rod optical bench with following accessories.Biprism holder having fine radial motion by screws. Adjustable slit with ground ss jaws Micrometer Eye Piece Ramsden’s 10x, carried on a slider which moves along a micrometer screw.Automatic lens holder with spring action for equal opening and closing of both ends
Low Pressure lamp giving spectral lines in 58890 A and 58950 A wavelenght range.Available : 35 / 55 Watt
With a rated output of 80 watt, this source provides sufficient intensity of white light for almost any experiment
Same as wooden box for sodium vapor lamp but slightly smaller
Wooden box with slits on three sides to perform 3 experiments at a time, each slit has two riders to adjust the lenght of slit or close it when no experiment is being performed.Regular quality made of ordinary wood.Deluxe quality made of superior wood and has different sized slits for different experiments. The height of the box can also be adjusted to suit the requirements of the experiment
Amounted on nice duco painted round cost iron heavy base with three levelling screws and 25mm dia and 450mm long steel pillar. The telescope is provided with high class optical combination and brass. C.P. fittings, provision for up and down, to and from moting is incorporated, complete with perspex scale and scale and scale holder.
For demonstration of interference, diffraction and holography. Laser source and switch mode power supply are housed in a thick aluminium box with a hole through which laser beam comes out. The laser unit is mounted on a precision 1 meter double rod SS optical bench. Intensity of laser beam is 2mW and it is red in color. Input power is 220V AC. Minimum operating life is 15,000 hrs. and shelf life is 10 year. The unit is supplied with single slit and diffraction gratingAlthough this is a very safe equipment to handle still a few precautions will ensure proper safety and long life viz. Operate the laser at least once in a fortnight
Diode Laser Assembly
Workable on 230V AC, it gives stabilized power output of 2 amp. 12V DC, housed in sturdy metal box.
