| Liquid Lens |
This apparatus consists of graduated vertical post with rigid base along with diode laser and required optics. A pointer illuminated
with the laser diode is mounted on the vertical post. The illumination helps to conduct the experiment even in dark room conditions. The pointer is free to move along the axis of the vertical post and can be easily clamped at desired positions. |
|
The liquid lens arrangement is kept on a rigid base. The
pointer is raised or lowered till the tip of its image coincides with the
tip of the pointer without parallax. The distances of the pointer from
top and bottom of the lens are measured. The experimental setup
includes three convex lenses of different focal lengths and a plane
mirror. A petri dish carrying mercury is also included in this setup. |
 |
| Components Included |
• post with rigid base
• Illuminated needle with power supply
• Lens set with different focal lengths
• Mercury with dish
• Flat mirror |
|
| Experiments |
• To determine the refractive index of liquid by
forming a liquid lens. |
>> Focal length of convex lens
>> Focal length of liquid lens
>> Radius of curvature of liquid lens |
|
• To determine the refractive index of given liquid by
using a liquid of known refractive index. |
| Focal length of convex lens |
The convex lens L is placed on the plane mirror. A
bright pointer P is arranged till the tip of its image
coincides with the tip of the pointer without
parallax. The distances of the pointer from the top
and the bottom of the lens are measured. The
average distance gives focal length of the lens. |
|
 |
| Focal length of liquid lens |
When a drop of given liquid is placed
between the mirror & lens, a thin liquid
lens is formed between them. |
|
 |
| Radius of curvature of liquid lens |
The lens is floated on mercury in a dish. The pointer
is adjusted above the lens as before, till its inverted
image coincides with it without parallax. The
distances of the pointer from the top and the bottom
are measured. The mean distance (d) is determined.
Thus the radius of curvature R of the marked face is
calculated. |
|
 |
|
|
|
|
| Geometrical Optics - Basic Kit |
 |
| Components Included |
• Optical rail
• Light source with power supply
• Lens set with different focal length
(Includes concave & convex lens,
concave & convex mirror)
• Optical mount with rail carriage |
|
Geometrical Optics-Basic kit
(Model No. HO-EQ-GO-02) is developed
for general physics education in
universities and colleges. It includes
120cm-long graduated optical bench
with carriers. The optical components
such as lenses, mirrors, laser, etc. are
fixed to the carriers through suitable
mounts and can be fixed anywhere on
the rail. Students can easily adjust the
positions of optical devices using the
sliding carriers. All the accessories are
easy to be mounted and adjusted. |
Though the experimental
possibilities are many, only a few basic
experiments like determination of focal
lengths are listed. The kit includes set of
lenses, concave/convex mirror, laser,
etc. The use of diode laser as light
source makes the ray path visible and
helps students to assimilate the basics
easily. |
| Experiments |
• To measure the focal length by measuring object and image distances.
Convex lens , Concave mirror.
• To measure the focal length using parallel beam method.
Convex lens , Concave mirror.
• To measure focal length of a combination of two lenses separated by a distance.
• To measure focal length and radius of curvature of concave
and convex mirror using parallel beam technique. |
|
 |
|
|
|
|
| Geometrical Optics - Comprehensive Kit |
|
Geometrical optics-comprehensive kit
contains everything students need to perform
variety of precise optical experiments. 150cmlong
graduated rail and carriage system securely
holds optical devices such as light sources (laser& high bright LED), lenses, and other accessories.
It allows user to conduct experiments utilizing
geometric principles and optics. |
Students can easily adjust the positions
of optical devices using the rail carriers. All the
accessories can be easily mounted and adjusted. Almost all optical experiments required in general physics and engineering physics education can be performed in sequence using
these components. This comprehensive kit helps students to investigate the properties of lenses and to construct simple optical instruments. |
|
| Experiments ........................................................................................................................................................................................... |
| Light Intensity Experiment |
The intensity of light decreases with the square of the distance between the light source and the object. |
| Reflection, Refraction & Transmissions |
Snell's Law
• Verify the law of reflection through experiments.
• Verify the law of refraction through experiments.
• Measure the index of refraction of water.
• Observe the behavior of light when transmitted through
various types of prisms. |
| Lenses |
• Familiarization with different kinds of lenses such as Plano
concave & convex, Bi concave & convex, Achromatic lens, +ve & -ve Meniscus lens, Cylindrical lens, Semi circular lens, etc. |
|
| Lens Measurements |
• To explore the difference between convex and concave
lenses and to determine their focal lengths using UV & parallel
beam method. |
|
• To explore the difference between convex and concave mirror and to
determine their focal lengths using UV & parallel beam method.
• To measure the focal length of convex lens in combination.
• To measure the focal length and radius of curvature of a concave and convex mirror using parallel beam technique. |
| Optical Instruments: |
• Construct a laser beam expander.
• Construct a collimator.
• Assembling a simple & compound microscope.
• Assembling a telescope.
• Assembling a projector. |
|
|
|
|
| |
