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A candle flame and a screen are 180 cm apart. A lens is placed between them. For a certain position of the lens a twice magnified clear image is obtained on the screen. The lens is now moved away from the candle through 30 cm. To obtain another clear image on the screen, the distance through which the screen has to be moved is _________ and the new magnification of the image is __________.


A candle flame and a screen are 180 cm apart. A lens is placed between them. For 


a certain position of the lens a twice magnified clear image is obtained on the 


screen. The lens is now moved away from the candle through 30 cm. To obtain 


another clear  image on the screen, the distance through which the screen has to 


be moved is  _________ and the new magnification of the image is __________.


Grade:10

1 Answers

sanatan sharma
26 Points
9 years ago

the distance through which the screen has to be moved is -  15 cm towards the lens.

the magnification will be  (-5/6)

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