Analyse Elliptically Polarized Light

Aim

       To analyze elliptically-polarized light by means of Babinet Compensator.

Apparatus Required:

•     babinet compensator, 
  
•     sodium light, Â· 
•     white light,
•     quarter wave plate, 
  
•     nicol or poloride, 
  
•     eyepiece,
  
•     reading lens ,
  
•     plumb line
  

BI-PRISM ASSEMBLY P-689

AIM:

To find the wavelength of the sodium light using bi-prism diffraction experiment 

Consists of following app.:

(i )Bi-Prism Holder : fine radial motion by a fine pitch screw.

(ii) Lens Holder spring type : for equal opening & closing of both sides.

FRESNEL BI-PRISMS

To Be Used in above Experiment

LUMBER BOCHUM PHOTOMETER P-779

•       L.B. Photometer Head: Light from two sources falls on either side of a uniform white opaque screen.Thus it is reflected by side reflectors (optical prism) and passes through the Lumber Brodhun cube.
  
•       Observing the field through a telescope,the two light intensities are compared directly. 
  
•       Photometer head is mounted in a swivel bracket to facilitate reversal of the slides.
  
•       Lamp House: for above 2 nos.On electric bulb is encased in a metal case with cord & pin. 
  

MERCURY VAPOR LAMP P-790

Aim

NODAL SLIDE ASSEMBLY P-836

Aim

Mirror : Plain, inclinable with 3” steel stand

(ii) Nodal Upright :

consists combination of single &

double lens holders on a mount rotating along the vertical axis,

adjustable in height &

can either be moved together by rack &

pinion or relative to each other by sliding.

These motions can be read by individual pointers on a mm scale.

(Iii) Optical Slit: 

cross slit,

one surface white &

the other clack, with 3” steel stem.

(Iv) Lamp house :

* En electric bulb 60 W 220V AC is encased in a metal case with cord & shoe.

POLARIMETER P-851

AIM
                To Measure optical rotation of optically active substances

• A Glass tube is enclosed in a circular Aluminum tube with Lid for access and exclusion of external light.
  
• The graduated 0-360 scale is attached near the analyzer Vernier of 60 sec.
  
•  A movable Vernier on the scale enables reading of optical rotation to 60 seconds. 
  
•  Worm & gears combine rough & fine adjustment,
  
•  Provided with Half Wave Mica Plate, Giving three parts field for easy setting, Adjustable half shadow                    angles
  

POLARIMETER RESEARCH P-852

To Measure optical rotation of optically active substances.

FEATURES:

•         One piece Aluminum Cast body,
  
•         circular scale 0-360° combined with sugar scale -0 to 30°s to +130°s.
  
•         least count 0.05°*
  
•         Arrangement for 35W sodium lamp light source, w/o sodium lamp & txr. 
  

(a) 400 mm tube.

(b) 200 mm tube.

C) extra tube

POLAROIDS PAIR GRADUATED SCALE P-853

FEATURES:

•         Two identical units each provided with Polaroid disc mounted in a rotatable mount,
  
•         wtih aperture of 25mm, and a pointer traverses a 75 mm dia brass scale divided into 360° x 1.
  
•         Size is universal to fit any collimator or telescope.

·        For optical experiments -one polarizer is fixed &

·        the other can be rotated having aperture 25 mm &

·        scale 75 mm brass graduated with 360 x 1

•      one Polaroid fixed &
  
•      other rotatable aperture 20 mm ,
  
•      without any scale . 
  

TO DETERMINE THE REFRACTIVE INDEX OF THE MATERIAL OF THE PRISM FOR THE GIVEN COLORS OF MERCURY LIGHT WITH THE HELP OF A SPECTROMETER

To Determine the Refractive Index of the Material of the Prism for the Given Colors of Mercury Light With the Help of a Spectrometer

• To study the variation of angle of deviation with angle of incidence for a prism and to determine the refractive index of the material of the prism using (i-g) curve for a given wavelength using prism spectrometer . 
  
• To study the variation of refractive index of the material of the material of the prism with wavelength and to verify Cauchy’s dispersion formula. 
  
• To verify Hartmann’s formula using a prism spectrometer. 
  
• To verify Hartmann’s formula using a grating. 
  
• To calibrate the drum of a constant deviation spectrometer.
  

•       Spectrometer 
  
•       given prism 
  
•       mercury source 
  
•       and reading lens..
  

TO DETERMINE THE DISPERSIVE POWER OF THE MATERIAL OF THE PRISM FOR VIOLET AND YELLOW COLOURS OF MERCURY LIGHT WITH THE HELP OF A SPECTROMETER P-029

• To Determine the Dispersive Power of the  Material of the Prism for Violet and Yellow Colours of Mercury Light With the  Help of a Spectrometer.
  
• To determine the angle between crystal surface by a spectrometer.
  

APPARATUS REQUIRED:  

• Spectrometer 
  
• given prism 
  
• mercury source 
  
• and reading lens.
• crystal and
• Source

TO DETERMINE THE REFRACTIVE INDICES UO AND UE OF CALCITE (OR QUARTZ) FOR THE ORDINARY AND EXTRA ORDINARY RAYS USING A SPECTROMETER AND SODIUM LIGHT

To Determine the Refractive Indices Uo and Ue of Calcite (or Quartz) for the Ordinary and Extra Ordinary Rays Using a Spectrometer and Sodium Light

TO DETERMINE THE WAVELENGTH OF SODIUM LIGHT(MONOCHROMATIC SOURCES) WITH THE HELP OF A FRESNELS BIPRISM P-032

        AIM

•           To Determine the Wavelength of Sodium Light(Monochromatic Sources) With the Help  of a Fresnels Biprism.
  
•         To Determine the Thickness of Mica Sheet With the Help of Bi-prism.
  

APPARATUS REQUIRED: 

•         Optical bench with uprights, 
  
•         sodium lamp,
  
•         Biprism,
  
•         convex lens,
  
•         slit and micrometer eye piece.
  
•         Slit and micrometer eye piece are already fitted on the optical bench..
  

TO DETERMINE THE WAVELENGTH OF SODIUM LIGHT BY LLOYDS MIRROR P-033

To Determine the Wavelength of Sodium Light by Lloyds Mirror.

To find the thickness of a wire using optical bench

P-034 INSIF .
Apparatus used:
* Optical bench with uprights,
* sodium lamp, and
* micrometer eye-piece,
* slit (may be already fitted with optical bench) and
* thin wire.

P-053 INSIF and to study the variation of illuminating power of a filment lamp with the applied voltage.
Apparatus Used:- 
* lummer-bordhum, photometer,
* optical bench,
* two source of light,
* auto txr

Additional experiment: To determine the transmission coefficient of a given transmitting plate.

To determine the focal length of combination of two lenses separated by a distance with the help of a nodal slide and to verify the formula

P-054 INSIF
                                    1/f=1/f1+1/f2-x/f1f2
Apparatus Used:-
*   nodal slide arrangement ,
* optical bench,
* two convex lens

To verify the Newtons formula x1x2=f2 for lenses separated by a given distance

P-055 INSIF .
Apparatus Used:-
* optical bench,
* two convex lens,
* plane mirror two pins and applieds

To locate the cardinal points of a system of two thin convergent lenses separated by a distance and then to verify the formulae

P-056 INSIF
                                    L1h1=+xf/f2 and l2h2=+xF/f1
Apparatus Used:- 
* nodel slide assembly and
* two lens

To determine the radii of curvature of the surface of a convergent lens and hence to calculate its refractive index

P-057 INSIF.
Apparatus Used:- 
* convergent lens ,
* pin stand ,
* and clean mercury shallo dish ,
* screw gauge

To determine the refractive index of the material of concave lens

P-058 INSIF .
Apparatus Used:-
* optical bench ,
* pins,
* concave lens ,
* meter scale ,
* planne mirror,
* spirometer,

To determine the refractive index of a liquid using pulrich refract meter.

P-059 INSIF
Apparatus Used:-
* refractro meter,
* glass cell, liquid,
* light source,
* right angle prism

To verify the inverse square law and to determine the ratio of illuminating powers of two electric bulbs with the help of photo voltaic cell.

P-060 INSIF
Apparatus Used:-
* photo voltic cell,
* oopticla bench,
* two electric bulb,
* galvanometer,
* lamp & scale,

To determine the absorption coefficient of a liquid or solution with the help of voltaic cell.

P-061 INSIF
Apparatus Used:-
* photo voltic cell,
* rectangular glass vessel,
* graduated ,
* liqud, galvanometer,
* lamp & scale ,
* light source,
* convex lens

To determine the ionization potential of the gas filled thyratron

P-062 INSIF

the thyron valve fitted in the instrument with power supply & two meters, complete in all respects

To determine the dispersive power of a plane transmission diffraction fringes.

(14-1)
Apparatus Used:-
*   diffraction grating spectrometer,
* mercury lamp,
* prism,
* reading lamp,

Babinet Compensator

P-662A
*The compensator consists of two wedges of quartz, one fixed with optic axis in one direction while the other moving with optic axis in a perpendicular direction. The moveable wedge is move by means of a micrometer screw with a readable accuracy of 0.005 mm.
*The wedge system fixed in a box which is an integral part, can be rotated in a circular scale with least count 1/10 degree, fine and coarse movements .
*The analyser has an independent scale which can be arranged in any angular position with respect to wedges.