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    kanav's Avatar
    kanav Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 8, 2008, 12:00 AM
    Convex lens
    The image of a candle is formed by a convex lens.If the lower half of the lens is covered with black paper,will still the full image of the candle be formed?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 8, 2008, 08:12 AM

    What is your opinion? You can make use of a sketch to help you answer.
    mackythehacker's Avatar
    mackythehacker Posts: 191, Reputation: 10
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    #3

    Nov 1, 2008, 09:20 AM

    It would really depend on how far away it was...
    visharad's Avatar
    visharad Posts: 47, Reputation: 4
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    #4

    Nov 14, 2008, 03:23 AM

    The answer is no. In order for image to form, light rays have to move from the object to the lens. Light rays do not move from the covered part of the candle. Therefore, image of the covered part of the candle will not be formed.
    Rather, you will see image of black paper.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #5

    Nov 14, 2008, 03:51 AM
    Quote Originally Posted by visharad View Post
    The answer is no. In order for image to form, light rays have to move from the object to the lens. Light rays do not move from the covered part of the candle. Therefore, image of the covered part of the candle will not be formed.
    Rather, you will see image of black paper.
    Hi Visharad and welcome to the forums - we like to not answer homework questions on this board, as this doesn't help students to improve their skills, instead we prefer to prod them in the right direction, as the above answerers did. I hope you will follow with our approach.
    visharad's Avatar
    visharad Posts: 47, Reputation: 4
    Junior Member
    		  
    #6

    Nov 14, 2008, 03:55 AM

    Hi Capuchin,
    You are right. I did not realise that it was homework question. I thought the questioner was asking out of interest.
    Anyway, I will take care in future.
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