Friday, June 12, 2026

Beautiful Science Picture of Accessories use In Laboratory for students 8 to 12 std GSEB

Beautiful Science Accessories use in Laboratory.
Accessories used in Science Laboratory

Practical’s in chemistry and introduction of apparatus used
Before beginning the experiment in chemistry the student should have aware about
Principle,
Aim,
 Apparatus,
Chemicals used in experiments,
experimental method,
systematic note of  observation during the experiment chemical reactions and scientific conclusion.
                     
Apparatus used during the experiment :
            Test tube, Spatula, Tong, Stand, Test tube holder, Wire gauge, Tripod stand, Wash bottle, Measuring cylinder, Thistle funnel, Funnel, Distillation flask, Bunsen burner, Condenser, Watch glass, Dropper, Beaker, Conical flask, Evaporating dish etc.
During experiments, should not taste or drink solutions, nor touch or smell hot solutions or apparatus.
 If the need arises to smell, slowly and carefully do the same.
 Care should be taken to handle Bunsen burner.
 Glass rod should be used to stir the solution.
 Acid should always be added in the container containing water.

Test tube,
Spatula,
Tong,
Stand,
Test tube holder,
Tripod & wire gauge, 
Wash bottle, 
Measuring Cylinder,
Thistle funnel,
Funnel, Distillation flask,
Burner,
Condensor,
Watch glass,
Dropper,
Beaker,
Conical Flask, 
Evoparoting Dish,



Test tube

Spatula

Tong

Stand

Test tube Holder

Tripod stand and Wire gauge

Wash bottle

Measuring cylinder

Thistle funnel

Funnel

Distillation Flask

Bunsen Burner

Condenser

Watch Glass

Dropper

Beaker

Conical Flask

Evaporating dish

REFRACTIVE INDEX OF GLASS PRISM measure with Glass Prism for std 11 & 12 GBSE

Refractive index of  Glass Prism









REFRACTIVE INDEX OF GLASS PRISM 

12.2  AIM :-
Using pins with a given prism determine the angles of deviation for six different values of angle of incidence. Draw the graph of angle of deviation versus angle of incidence. Determine, from this the angle of minimum deviation and using following formula determine refractive index of material of the prism.
Formula for Refractive index of Glass Prism






Angle of prism, A = ……. .

APPARATUS:  Glass Prism, Drawing paper, Drawing board, Pencil, Ruler, Pin, Protector,

FORMULA : - A + d = i + e

PROCEDURE :-
Take paper and pin it on Drawing board. 
Now take Glass prism and put it on center of Drawing board paper.
Mark the edges of the prism with pencil
Refractive index of  Glass Prism procedure
Draw N1Q perpendicular to AB
Draw a line PQ making an angle i of 35O with N1Q
NOTE :- Pins should be 3 – 4 cm. away from each other.
Fix two pins vertically on line PQ  at point L & M.
Refractive index of  Glass Prism procedure
Place the prism in its original position.
Refraction takes place QR after placing prism on its original place
Now look from surface AC, adjust pin N & O vertically on the side which you are looking so that the images of the pins L & M and the pin N & O appear to be in the same straight line.
Refractive index of  Glass Prism procedure
Draw a line  SR
Measure d = Ð UDN
Refractive index of  Glass Prism procedure
Draw a line SR, and draw a perpendicular N2R at R to the line AC
Measure  e (Angle of Deviation)
Refractive index of  Glass Prism procedure
Refractive index of  Glass Prism procedure
Note :- Repeat the experiment by taking different angles of incidence viz.,
 40 0, 45 0, 50 0, 55 0 and 60 0.

For more details View Video

Angle of Deviation.

Center punch for ITI fitter, Mechanic with animated video

Center Punch ITI Fitter







Center punch for ITI fitter, mechanic  with animated video.

Center punch for ITI fitter mechanical work.

It is made up of High Carbon Steel.
Center punch 
Pointer angle 90 degree.
Center punch 
Grind Center Punch.
Center punch use
Hold punch perpendicular to work piece
Center punch use and hammer stroke position
Work piece on which punching  is done

Hammer Stroke should be straight to the head of the punch.
Center punch use and hammer stroke position
Center punch use and hammer stroke position
You will get deep impression which is on punch shape in metal

Cross section of punch impression.
Center punch impression on metal
 Cross section Center punch impression on metal

More details view video
Grinding process of Center Punch practical with video.


EFFECT OF TEMPERATURE ON RESISTANCE, GSEB Physics practical std 8 to 12

Effect of Temperature on Resistance


EFFECT OF TEMPERATURE ON RESISTANCE







AIM :-

You are given a Wheatstone bridge, a container filled with a liquid, a resistor made from an iron wire etc. Immerse the resistor in liquid and connect it in an appropriate arm of Wheatstone bridge. Measure the resistance at different temperatures. Draw the graph of resistance versus temperature and from it find the resistance at 200 c and 1000c. Use the following formula to determine(a ), the temperature coefficient of resistance.
Formula to calculate Effect of temperature on Resistance







PRINCIPLE  :-  On increasing the temperature of a conductor its resistance increases.

APPARATUS :- A coil of iron wire, container filled with liquid, a battery (2 V), a rheostat, a sensitive galvanometer, a simple key, a thermometer, a calorimeter, a burner, wire gauge, resistance box. 
Apparatus for Effect of Temperature on Resistance 
Practical Effect of Temperature on Resistance 
Procedure of Effect of Temperature on Resistance 
PRECAUTION :-               
(1)    Keep the iron cylinder completely immersed in liquid.
(2)    Keep all connections tight.
(3)    Stir the calorimeter for uniform heating of water. Note the temperature of the liquid immediately after the null point is obtained at every observations.
Graph of Effect of Temperature on Resistance
Draw the graph of Rt ® t. it is a linear graph. Extend this straight line on both the sides. Find R20 and R100 at the temperatures 20 0C and 100 0C respectively.
R20  = …………… W at temperature 20 0C
R100 = …………… W at temperature 100 0C
\     The temperature co-efficient of resistance of the given iron-wire is
RESULT :-  Temperature coefficient of resistance at given iron wire a = ………( 0c) -1

Beautiful Quantum chemistry pictures and its drawings for std 11 & 12 GSEB


Innovative Technique of chemistry
Beautiful Picture of Quantum Chemistry
Photo Electric effect

Absorption spectra

Absorption spectrum

Absorption Spectrum of Barium

Electromagnetic Spectrum

Continuous Emission of  Spectrum

Emission of Spectra

Emission spectrum of Barium

Emission Spectrum
Emission spectra of Elements

Emission

Photo electric Effect Machine

Spectrum of Hydrogen

Photo electric effect

Hydrogen spectrum series

Prism Output

Bhor's Model


Deflection of Alpha Particles

Bhors orbit

Rutherfords model
S - Orbitals
Shapes of D orbitals
Shapes of D orbitals 2
P - Orbitals
Shapes of P - Orbitals -2 
Shapes of P -Orbitals 1

Scattering Experiments

Neclueus  and Energy

Neucleus

Neucleus & Energy Value


Atomic Orbitals

Sub Shell and  Orbitals