Color Scheme:

LIGHT experiments

Analyse Elliptically Polarized Light

Aim

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

Apparatus Required:

  •     babinet compensator, 
  •     sodium light, · 
  •     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.

(iii) Micrometer Eye Piece : Rams den Eye Piece, 10 x, is carried on a slider which moves along a micrometer screw, perfectly made.
(iv) Optical Slit : Ground S.S. Jaws having spring action for opening .
(v) Fresbel Bi-Prism Size : 40 mm x 32 mm

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

              To be used in determine the wave-length of monochromatic light by diffraction.

FEATURES:


  •        80 watt with choke and wooden box.
  •        do 125 watt ( No need of choke).
  •        80 watt with choke without wooden box
  •     choke without wooden box.
    .

NODAL SLIDE ASSEMBLY P-836

Aim

              To Determine the Focal Length of Two Lenses by Nodal Slide
       Apparatus Required:

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


    FEATURES:

 

  • 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

AIM

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.
POLAROID PAIR TWO IN ONE WITH SCALE P-953 B

·        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


POLAROID PAIR TWO IN ONE WITHOUT SCALE P-953 C

  •      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

Aim

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

ADDITIONAL EXPERIMENT:

     
  • 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.

APPARATUS REQUIRED:  

      

  •       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

Aim

  • 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

Aim

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


APPARATUS REQUIRED: 


  •         Spectrometer,
  •         prism,
  •         calcite or quartz prism with its optic axis parallel to the refracting edge, 
  •         sodium lamp, 
  •         reading lens...

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

AIM:
To Determine the Wavelength of Sodium Light by Lloyds Mirror.

APPARATUS REQUIRED: 


  •         Optical bench with uprights,
  •         sodium lamp,
  •         Lloyd’s mirror,
  •         micrometer eye-piece (may be already fitted on the optical bench) and 
         

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.

TO DETERMINE THE WAVELENGTH OF SODIUM LIGHT BY NEWTONS RINGS

AIM:

  • To Determine the Wavelength of Sodium Light by Newtons Rings.
  • To Determine the Refractive Index of a Liquid by Newtons Rings
  • To Determine the Radius of Curvature of the Given Concave Lens by Forming Newtons Rings With the Combination of Convex and Concave Lenses.  

   APPARATUS REQUIRED: 
  
  • A Plano-convex lens of large radius of curvature,
  •  optical arrangement for Newton rings,
  •  plane glass plate, 
  •  sodium lamp and
  •  travelling microscope..  

TO DETERMINE THE WAVELENGTH OF SODIUM YELLOW LIGHT P-035

       AIM:


  • The  Difference Between the Wavelengths of Two Sodium D-lines With the Help of  Michelson Interferometer.
  • To Determine the Wavelength of Sodium Yellow Light

 APPARATUS REQUIRED: 


  • Michelson interferometer, 
  •  Sodium Lamp,
  •  Condencing Lens Pin

To determine the separation between plates of a Fabry-Perot Etalon.

P-036 INSIF
Apparatus Used:
-
*  Fabry Perot Etalon,
* Codecing lens ,
*Sodium Lamp

To determine the thickness of the given wire by Wedge method.

P-037 INSIF
Apparatus Used:- 

* two opticaly glass plate of same size,
* black paper,
* sodium lamp,
* microscope ,
* wooden frame and
V one glass late

To determine the value of Youngs modulus Y for the material of a rod Searles optical interference method

P-038 INSIF .
Apparatus Used:-

* Searle’s app,
* convex lens,
* 50 gm weight vernier caliper ,
screw gauge,
* sodium lamp

To determine the value of Youngs modulus Y of Cornus method.

P-039 INSIF
Apparatus Used:-

*   wooden frame ,
* a small rectangular glass plate,
* stand,
* sodium lamp,
* hanger,
* weight,
* travelling microscope,
* screw gauge
* vernier caliper

To determine the wavelength of prominent lines of mercury by plane diffraction grating.

P-040 INSIF
(14-1) To determine the dispersive power of a plane transmission diffraction fringes.
Apparatus Used:-

*   diffraction grating spectrometer,
* mercury lamp,
* prism,
* reading lamp,

To determine the diameter of lycopodium particles by forming diffraction fringes

P-041 INSIF .
Apparatus Used:-

* optical bench,
* glass plate,
* lycopodium powder,
* sodium lamp,
* metal plate with hole,

To determine the wavelength of monochromatic light by diffraction at a straight edge

P-042 INSIF .
Apparatus Used:-

* optical bench,
* straight edge slit,
* stand,
* travelling microscope,

To determine the resolving power of a telescope

P-043 INSIF .
Apparatus Used:
-
* telescope with adjustable slit,
* black cardboard,
* mercury light,
* resolving slit

To determine the resolving power of a grating.

P-044 INSIF
Apparatus Used:-

*   gratting,
* spectrometer,
* mercury lamp,
* prism,
* micrometer slit,
* reading lens

To determine the specific rotation of cane sugar solution with the help of a polarimeter

P-045 INSIF
Apparatus Used:-

* polarimeter,
* balance,
* cylinder,
* beaker,
* sodium light

To study the polarization of light by simple reflection.

P-046 INSIF
Apparatus Used:-

* glass plate,
* photo voltic cell,
* 60 watt lamp,
* micrometer,
* poloride,
* convex lens

To determine Brewsters angle for a glass surface and hence to determine the refractive index of glass

P-046-1 INSIF .
Apparatus Used:-

* spectrometer,
* mercury light,
* glass prism,
* poloride attch to telescope objective

To verify the cosine square law (Malus law) for plane polarized light with the help of photo voltaic cell.

P-047 INSIF
Apparatus Used:-

* photo voltaic cell ,
* galvanometer,
* lamp & scale,
* source of light ,
* convex lens,
* poloride pair,

To analyze elliptically-polarized light by means of Basinets compensator.

P-048 INSIF
Apparatus Used:-

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

To verify Fresnels formulae for the reflection of light

P-049 INSIF .
Apparatus Used:-

* spectrometer,
* prism,
* sodium lamp,
* a pair poloride,
* telescope,
* collimater tube ,
* reading lens

To study elliptcaly-polarised light by means of a photoelectric cell

P-050 INSIF .
Apparatus Used:-

* photo voltic cell ,
* optical bench,
* dead beat galvanometer,
* light source,
* double reffleting plate,
* poloride ,
* lamp & scale,
* slit

To determine the value of Rydbergs constant with the diffraction grating and hydrogen tube.

P-051 INSIF
Apparatus Used:-

* spectrometer,
* grating,
* hydrogen discharge tube ,
* stand, or
* txr

To determine the height of a tower with the help of a sextant.

P-052 INSIF
Apparatus Used:-
 
* sextant and
* measuring plate

Additional experiment: Ex.(1) to determine the height of a distant object with the help of a sextant by artificial horizon.
Ex.(2) To determine the attitude of sum.
Ex.(3) To determine the angular diameter of sun.


To compare the illuminating powers of two given sources of light with a Lummer-Brodhum photometer

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.


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