Other Event

‘OPTICA’ - A session on Ray Optics by IIT Madras

IIT Madras collaborated with our school to demonstrate experiments related to ray optics in their session “Optica”. Students of class 12 A, 12 B and 12 C had the opportunity to watch and perform 8 different experiments related to ray optics. The experiments focused on various properties of light like reflection, refraction, diffraction, TIR and a lot more.

It was an exciting and “illuminating” experience to see the theoretical concepts applied directly in practical experiments that can be easily replicated. The experience enhanced students’ connect with the subject. Some of the experiments listed below were definitely eye-openers.

Spectrum of light:

  • 1. Mixing of light:
  • The three main primary colors are red, green, and blue. All the other colors are formed by combining these.

  • 2. How objects show color:
  • Objects absorb the light rays and reflect light of certain a wavelength. This is the color of that object. Black doesn’t reflect light at all while white reflects all the colors. (In temples, the pathway is painted white as it doesn’t become hot on a sunny day)

Path of light:

  • 1. Rectilinear propagation of light:
  • Light moves in a straight path (homogenous mixture).

  • 2. Reflection through a plane mirror:
  • Angle of incidence = angle of reflection

  • 3. Convergence and divergence of light through spherical mirrors:
  • Convex mirror: diverging

    Concave mirror: converging

    The path of light was seen through a colloidal solution (Dettol solution)

Reflection- an overview:

  • 1. TIR (total internal reflection):
  • When the angle of incidence is greater than that of the critical angle, light rays get reflected continuously inside the second medium.

    Applications: optic fiber, diamond making, etc

  • 2. Invisibility:
  • When an object is kept in a medium of the same refractive index as itself, it does not get reflected (glass rod in water can be seen but in oil it cannot be seen).

  • 3. Periscope:
  • It is device that is used to view objects at a higher height that the eyelevel (it is used in submarines to see the surface above the water).

    It works on the principle of multiple reflections.

Dispersion of light and telescope:

  • 1. Rainbow:
  • White light constitutes the seven colors of VIBGYOR.

    When light passes through a rain drop, it first gets dispersed into the colors of a rainbow. Then it undergoes internal reflection after which it is finally refracted out of the drop.

    Red has the highest wavelength of around 632 nm and can be seen through a longer distance than the other colors.

    Although the rainbow is a full circle, we can see only half of it as the other half gets submerged under the horizon.

  • 2. Telescope:
  • It consists of two lenses-

    The objective focuses objects at infinity at the focus as a sharp point image.

    The eyepiece enlarges this image, and the eye can see the object distinctly.

    Polarization and diffraction:

    • 1. Polarizer:
    • This is a plane used to transfer light along only one direction (no light passes through polarizers directing light in different directions).

      But when a plate of different is kept between them, some light gets transferredand the plate is seen.

    • 2. Grater:
    • It has a plane with lines of light (splits) on its surface that splits white light when it passes through it. These are either parallel straight lines or concentric circles.

      This principle is used in X-ray diffraction (depending on the wavelength of light read through the splits, the image is formed).

    Solar cell:

    It converts solar energy to electrical energy. The amount of energy produced depends on the area of light absorbed.

    Sun follower- it is an addition to the solar panel where the sensors help the panel to follow the sun from sunrise to sunset. This increases the amount of energy produced.

    VR (virtual reality) box:

    There are twovideos that are focused as one when we view them. The videos are either recorded or give a 360-degree view.

    The 360-degree view is aided with the help of two sensors to sense the direction movement of the head. A 360-degree image is formed by stitching various images together.

    Overall, this learning experience based on experiments has helped in better comprehension of the concepts. The session has provided a very strong foundation in ray optics for the students of Class 12.

    Investiture Ceremony

    The investiture ceremony for the student council of 2024- 25 of P S Senior Secondary School was held on 19th June 2024 at TAG Dakshinamurthy Auditorium in the school premises.

    The School Pupil Leader, Cultural Secretary, Sports Secretary , The Fourth Estate, Sports House Captains, Vice Captains received customised badges from the Principal Mrs Revathy Parameswaran.

    The Principal also handed over class leader badges to students from std 1 to 12.

    This was followed by an oath taking by the leaders pledging allegiance to their institution, treating everyone with respect and adopting the path of honesty and integrity in all their endeavours.

    The event concluded with the National Anthem


    On 24rth April 2024, in Chennai, the Sun was at zenith-directly overhead- and therefore vertical objects cast no shadows.

    Children from middle school observed this phenomenon which happens twice a year for locations in the Tropics. This year it was visible in Chennai, Bengaluru and Mangaluru.

    It was a great learning experience for the students.


    The students of classes 8,9 and 10 had a lively session with the poet Claus Arkensen on 16/11/23. The event was held in seminar Hall between 11 am and 12 noon. Hailing from Denmark, Mr.Arkensen has visited India many times. He spoke about his visits and has penned his memories in a vivid imagery in his poems. The poems written by the students were appreciated by him. The students enjoyed the session with the poet

    Art Exhibition by our school students

    The Art work of our School students Vinaya Jagan of Class XI,Shambhavi of Class X and Akshaya of class IX were part of the Art exhibition themed 'Fantasia' held on 23 september 2023 at C.P.Art centre

    Cleanliness drive as part of Swachch Bharath Mission

    To commemorate Swachata Divas, a cleanliness drive was conducted on 1st October 2023. Class 8 children were chosen for the activity. Around 9.15 am, children along with two teachers and sub staff went to the street opposite to school and started picking the plastic trash. The collected trash was disposed off properly. The activity was also meant to create an awareness in students to keep their environment clean and to dispose plastic wrappers properly.

    Project Veer Gatha @ PS

    Project Veer Gatha was instituted by the Government of India with the aim to disseminate the acts of bravery of Gallantry Award winners among the student community and to raise the spirit of patriotism and instill values of civic consciousness. Students of our school participated enthusiastically in the project by writing poems and essays.

    Bagless day for classes 1 to 8

    Schools are not just about books and bags. Learning can happen through informal interactions and exciting activities too. At P.S., we constantly explore ways of making learning enjoyable. On 22/09/2023, students of classes 1 to 8 had a bagless day. Age appropriate activities were planned to make the day engaging and entertaining for all the students.

    Students of Classes 1 and 2 had a fun-filled aerobics session followed by play dough modelling and t-shirt painting.

    Students of classes 3, 4 and 5 had origami session, floral design, t-shirt painting, cloth folding and sandwich making.

    As a part of “No Book Day”, fun-filled activities were planned for students of classes 6, 7 & 8. One of the activities was Rangoli using colours or flowers. Topics were given a few days before so that students could plan their design.

    The topic given for class 6 was SAVE ENERGY, for class 7 “SAVE WATER” and for class 8 “REDUCE SINGLE-USE PLASTIC”.

    The students were informed to plan the design for the rangoli, house- wise in each section. They were given an hour to complete the activity. Every child enjoyed the activity and it served as an awareness program too.

    World Paper Bag Day

    Students of class 9E made Paper bags on 12th July 2023 for the "World Paper Bag Day"