Site Navigation

Your Account

Choose Language

1.2

Major VersionM

by Suhail Ahanger

Introduction

Cut out different shapes on a cardboard piece - star, square, circle etc. Now place the cut-out under the Sun or near a candle in a dark room and observe the shadows. Can you identify the umbra & penumbra?

Video Overview

    • Handle the scissors/cutter with care

    • Use a lit candle under adult supervision

    Add Comment

  1. On a thick cardboard sheet, draw different shapes such as a square ,circle , triangle and star of similar size .
    • On a thick cardboard sheet, draw different shapes such as a square ,circle , triangle and star of similar size .

    • Cut out the different shapes drawn on the cardboard sheet.

    Add Comment

    • Light a candle and observe the shadows formed by moving the card sheet closer to and then further away from the candle.

    • Make sure you have a screen or wall at the back to project the shadows.

    • You may also try observing the shadows formed outdoors in direct sunlight

    Add Comment

    • The different shapes cut out should be of similar size.

    • Use a thick cardboard sheet so that it is easier to cut the shapes.

    • It is recommended to turn off the lights and use a candle for this tactivity for viewing the shadows and their features. Or outdoors in the bright Sun

    • The shapes should not bee too small or too big; they should be about the size of the candle flame.

    Add Comment

    • What do you observe with the shadows? When is it the clearest, and when the blurriest?

    • Are the shadows always there in some form, or do they also disappear altogether? Can you think why?

    • Try with different sources of light, e.g. the Sun, bulbs of different sizes, smaller sources of light etc and note down your observations.

    • You may also vary the size of the cutouts (smaller and bigger) and see what happens.

    Add Comment

Finish Line

Suhail Ahanger

Member since: 05/02/2017

3,665 Reputation

55 Guides authored

0 Comments

Add Comment