Details on the hands-on session / experiments Title : Path ... · Details on the hands-on session / experiments Title : Refraction Experiments Objective : To explain dispersion of

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Details on the hands-on session / experiments

Title : Path of light: Straight line

Objective : To explain light travels in straight line with various activities

Brief Description :In this experiment we will explain light always travel in straight line through various activitiesa) Using straight and bend tubesb)Shadows of objects on screen i) how does dimension of shadow varies as screen distance is increased. ii) What happen to shapes of shadows as we move away. iii)Factor affecting size/shape of shadows iv) Shadows with multiple sources of light

List of articles required : plastic tubes, candles, cardboards and A0 size papers

Schematic of the experiment

a)

b)

Objects for shadows

Minutes & Recos. of POC meeting - May 03, 2017 Version - 0 ; Page : 1 / 13


Title : Fate of light falling on different objects

Objective : To explain how light reacts when it falls on different material

Brief Description :In this experiment we want clear the concepts of a) transparent, opaque and transparent objects with demonstration(wood, glass, water, iron etc). Extent of absorption of light.b) Light falling on rough surfaces scattering which in result act as a source of light. (surface can be shown with microscope)c) Moving towards smooth/shiny surface acting as reflecting surfaces

List of articles required : laser, torch, plain mirror, beaker


a)

b)



Title : How to a make Periscope

Objective : To explain laws of reflection through one of it's application

Brief Description :In this experiment we want will explain laws of reflection. We will be providing teachers with cardboards and mirrors. We can provide them with the dimensions and angle of mirrors to be placed. Periscope will work only for particular angle/ planar alignment of mirrors which require understanding of laws of reflection.

List of articles required : Meter Scale, 2 Plane Mirrors, cardboards, Cello Tape




Title : How to make Kleidoscope

Objective : To explain how multiple images and symmetric patterns

Brief Description :In this experiment we want clear the concepts of a) Multiple reflectionb) Symmetric patterns

List of articles required : 3 Plain Mirrors, Cello Tape, Color pins, Card Board



Title : Reflection Experiments

Objective : To understand concept of real/virtual and inverted/straight images

Brief Description :In this activity we will first discuss a) concave/convex surfaces through spoon. Then we will observe how imagechanges with distance of face from spoon.b)We will similar exercise with concave/convex mirrors.

List of articles required :Spoon, 1 laser, 1 candle, 1 plain mirror, 1 concave mirror, 1 convex mirror, mirror stands.


a)

b)


Title : Refraction Experiments

Objective : To understand refraction of light

Brief Description In this experiment we take plate/ pot and place coin in the center.a) In the empty pot we mark the minimum horizontal distance of observer where can't see coinb) Now on the same position, observer sees the coin when we fill it with water.c) Further rays diagrams can be drawn to explain path of light rays.

List of articles required : Beaker/Steel plate, Coin


a)

b)



Objective : To understand refractive index

Brief Description In this experiment we showa) glass rod placed in water beaker bends.b) If we put castor oil in the water, rod part in the water disappears as both have same refractive index.

List of articles required :Castor oil , Glass Rod and Beaker




Objective : To understand why does star twinkle

Brief Description In this experiment we show how star twinklea) We put a candle(acting as star) in front of beaker filled with water which will form image on screen placed other side. If we stir the water, image also start twinkling as star twinkles. b) Further ink can be put in water to show effect of absorption resulting in reducing the intensity of light.

List of articles required :Candle, Beaker, Screen, Ink




Objective : To understand spheroidal shape(water droplet) acting as lens

Brief Description In this experiment we show how water droplet act as lensa) water droplet has curvature and refractive index higher than air, act as converging agent for light.b) How the image magnification varies with position of droplet between source and observer.

List of articles required :Glass, Bottle




Objective : To make galelioscope

Brief Description In this experiment we will explain how far object can be seen nearby using galelioscope.

List of articles required :2 convex lenses of different diameter, 2 tube of respective diameters





Objective : To demonstrate the phenomena of TIR

Brief Description : In this experiment we demonstrate a)if the angle of incidence is greater than critical angle light will reflect inside the medium. We use laser passing through flowing waterb) Coin kept in water filled beaker can't be seen if top view is blocked.

List of articles required :1 newtonian telescope, 1 concave mirror





Objective : To explain dispersion of light using prism

Brief Description : In this experiment we will discuss how light with different wavelengths willhave different refractive index for a given material. This will be shown for white light dispersing into all seven visible components using a) Water filled beaker and plain mirror b) prism

List of articles required :Beaker, 1plain mirror ,1 prism, 1 torch light, 1 screen


a)

b)



Title : Reflection Experiments

Objective : To demonstrate the working of newtonian telescope

Brief Description : In this activity we will discuss the working of newtonian telescope. We willdiscuss how to make a newtonian telescope, given the telescope magnification.

List of articles required :1 newtonian telescope, 1 concave mirror



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Details on the hands-on session / experiments Title : Path ... · Details on the hands-on session / experiments Title : Refraction Experiments Objective : To explain dispersion of