10
Question
A student focussed the image of a candle flame on a white screen using a lens. He noted down the position of the candle screen and the lens as mentioned below:
Position of candle = 12.0 cm
Position of lens = 50.0 cm
Position of the screen = 88.0 cm
(iv) Nature of image if he shift the candle between 12 cm and 31 cm?
A student focussed the image of a candle flame on a white screen using a lens. He noted down the position of the candle screen and the lens as mentioned below:
Position of candle = 12.0 cm
Position of lens = 50.0 cm
Position of the screen = 88.0 cm
(iv) Nature of image if he shift the candle between 12 cm and 31 cm?
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Solution
The correct option is D Erect, Virtual, Enlarged
When the object is between 12 cm and 31 cm, the object distance is in the range:
u∈(−19 cm,0)
But, -19 cm is the focal length of the lens. So, the object is placed between the focus and the optic centre. This means that the image formed is enlarged, virtual and erect.
When the object is between 12 cm and 31 cm, the object distance is in the range:
u∈(−19 cm,0)
But, -19 cm is the focal length of the lens. So, the object is placed between the focus and the optic centre. This means that the image formed is enlarged, virtual and erect.
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