Applied Science Lab Instruments

Approx. Rs 9,800 / UnitGet Latest Price

High Resistance Measurement by Leakage Method is useful for measuring very high value of Resistance. Digital Multimeters or LCR meters are used to measure the normal value of resistance (generally 1 Ω - 20M Ω) but in the case of very high value of resistance these are unable to measure with high accuracy.

Leakage method is very accurate way to measure the high value of resistance because of very sensitive ballistic galvanometer with scale & lamp arrangement and very low value of capacitances used in the product. It is provided with different values of unknown high resistances on rotary selection and different values of capacitors.

• A complete setup with all accessories
• Inbuilt DC power supply
• Ballistic Galvanometer with Moving coil of large moment of inertia
• Ballistic Galvanometer with Flexible phosphor-bronze ribbon suspension
• Lamp and scale arrangement with adjustable stand

Additional Information:

• Item Code: BTC-BSC-89

Approx. Rs 11,000 / Piece(s)Get Latest Price

After experimental arrangement, the glass plate is inclined at an angle 45° to the horizontal.This glass plate reflects light from the source vertically downloads and falls normally on the convex lens. Newton's rings are seen using a long focus microscope, focussed on the air fil. The cross-wire of the microscope is made tangential to the 20^th ring on the left side of the centre. The readings of the main scale and vernier scale of the microscope are noted. The cross wire is adjusted to be tangential to the 18^th,16^th, 14^th etc on the left and 2nd, 4th, 6th etc on the right and readings are taken each time. From this the diameter of the ring is found out which is the difference between the readings on the left and right sides. The square of the diameter and hence Dn² and D²n m are found out. Then wavelength is calulated using equatio.
Components:

Light source, Filter, Microscope, Lens, Medium and Glass plate.

1. Choose Medium Combo box helps you to choose the type of medium that the simulation have to perform.
2. Radius Slider helps to change the radius of curvature of lens.
3. The wavelength slider helps to change the wavelength of light used.

1. The start button will help to play the simulation.
2. The variation in the rings can be seen when the medium,wavelength of light or the radius of the lens changes.

1. Click on the "light on" button.
2. Select the lens of desirable radius.
3. Adjust the microscope position to view the Newton rings.
4. Focus the microscope to view the rings clearly.
5. Fix the cross-wire on 20^th ring either from right or left of the centre dark ring and take the readings .
6. Move the crosswire and take the reading of 18^th,16^th...........2^nd ring.
7. You have to take the reading of rings on either side of the centre dark ring.
8. Enter the readings in the tabular column.
9. Calculate the wavelength of the source by using the given formula.

To find Least Count

One main scale division = ............... cm

Number of divisions on Vernier = ...............

L.C = One main scale division/ Number of division on vernier=.......................

Calculation:

Mean value of D²_{m p} - D²_m =.......cm²
Wavelength of light = (D²_{m p} - D²_m)/4pR

=.............................nm

Wavelength of light from the given source is found to be = ..........nm

Approx. Rs 2,100 / Piece(s)Get Latest Price

• Accurate measurement
• Long working life
• Compact design

Approx. Rs 9,400 / EACHGet Latest Price

Principle and Working :
Resolving power of a telescope is defined as the reciprocal of the smallest angle subtended at the objective lens of the telescope by two point objects which can be just distinguished as separate.
Resolving power of telescope is given by :

Resolving Power = D/d = a / 1.22 λ

Where, λ = 589 nm mean wavelength of light used
D = is distance of the objects from objective of the telescope.
d - is distance between two consecutive slits or objects
a - is critical width of the rectangular slit for just resolution of two slits or objects.

Exp-1 To determine the resolving power of a telescope.

Key topics

• Resolving power.
• Monochromatic light.
• Critical width.
• Traveling microscope.
• Consecutive slit.

Additional Information:

• Item Code: BTC-BSC-2362-48

Approx. Rs 15,500 / Piece(s)Get Latest Price

Approx. Rs 4,500 / PieceGet Latest Price

Approx. Rs 12,500 / PieceGet Latest Price

Additional Information:

• Item Code: 9027123
• Production Capacity: 100
• Delivery Time: 1
• Packaging Details: BOX

Approx. Rs 3,850 / pcGet Latest Price

Approx. Rs 12,500 / eachGet Latest Price

In this experiment, the user will prepare a sugar solution of known concentration (c), but unknown identity. The user will obtain the observed rotation (α_obs) from the experiment using the polarimeter and use that information to calculate the specific rotation [α] of the given sample using the above formula. The identity of the sample can thus be found out from the given list of specific rotations for different chemicals.

The procedure to perform this experiment is self-explanatory and leads the user in a step-by step manner to accomplish the task. The protocol briefly involves the following steps:

Approx. Rs 3,500 / pcGet Latest Price