Explain the reflection of light on white paper screen with the help of an activity.




  • Place a concave mirror fixed on a stand, on a table. Make a screen of about 15 cm × 10 cm using white paper pasted on a cardboard.
  • Keep a lighted candle at a distance of 50 cm from the mirror, on a table.
  • Try to obtain the image of the flame on the screen, by moving the screen till a sharp image of the flame is obtained.
  • Next, move the candle towards the mirror and place it at different distances from it, so as to obtain the image on the screen.
  • You will observe that the image formed by a concave mirror can be smaller or larger in size than the object or may be real or virtual.

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