the image formed on a screen by a concave mirror of radius 20 cm is 3 times the size of the object. what is the distance of the screen from

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the image formed on a screen by a concave mirror of radius 20 cm is 3 times the size of the object. what is the distance of the screen from the mirror?​

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Khải Quang 3 years 2021-08-19T09:06:22+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-08-19T09:07:33+00:00

    Given that,

    Radius of mirror = 20 cm

    Size of image = 3 times of size of object

    We need to calculate the distance of the screen from the mirror

    Using formula of magnification

    *** QuickLaTeX cannot compile formula:
    m=-\dfrac{h'}{h}=\dfrac{v}{u}
    
    *** Error message:
    Cannot connect to QuickLaTeX server: cURL error 28: Operation timed out after 40004 milliseconds with 0 out of -1 bytes received
    Please make sure your server/PHP settings allow HTTP requests to external resources ("allow_url_fopen", etc.)
    These links might help in finding solution:
    http://wordpress.org/extend/plugins/core-control/
    http://wordpress.org/support/topic/an-unexpected-http-error-occurred-during-the-api-request-on-wordpress-3?replies=37

    *** QuickLaTeX cannot compile formula:
    -\dfrac{h'}{h}=\dfrac{v}{u}
    
    *** Error message:
    Cannot download image from QuickLaTeX server: cURL error 52: Empty reply from server
    Please make sure your server/PHP settings allow HTTP requests to external resources ("allow_url_fopen", etc.)
    These links might help in finding solution:
    http://wordpress.org/extend/plugins/core-control/
    http://wordpress.org/support/topic/an-unexpected-http-error-occurred-during-the-api-request-on-wordpress-3?replies=37

    Where, h’ = size of image

    h = size of object  

    v = image distance from mirror

    u = object distance from mirror

    Put the value into the formula

    *** QuickLaTeX cannot compile formula:
    -\dfrac{3h}{h}=\dfrac{-v}{u}
    
    *** Error message:
    Cannot connect to QuickLaTeX server: cURL error 52: Empty reply from server
    Please make sure your server/PHP settings allow HTTP requests to external resources ("allow_url_fopen", etc.)
    These links might help in finding solution:
    http://wordpress.org/extend/plugins/core-control/
    http://wordpress.org/support/topic/an-unexpected-http-error-occurred-during-the-api-request-on-wordpress-3?replies=37

    *** QuickLaTeX cannot compile formula:
    \dfrac{3}{1}=\dfrac{v}{u}
    
    *** Error message:
    Cannot connect to QuickLaTeX server: cURL error 52: Empty reply from server
    Please make sure your server/PHP settings allow HTTP requests to external resources ("allow_url_fopen", etc.)
    These links might help in finding solution:
    http://wordpress.org/extend/plugins/core-control/
    http://wordpress.org/support/topic/an-unexpected-http-error-occurred-during-the-api-request-on-wordpress-3?replies=37

    *** QuickLaTeX cannot compile formula:
    v=3u
    
    *** Error message:
    Cannot connect to QuickLaTeX server: cURL error 52: Empty reply from server
    Please make sure your server/PHP settings allow HTTP requests to external resources ("allow_url_fopen", etc.)
    These links might help in finding solution:
    http://wordpress.org/extend/plugins/core-control/
    http://wordpress.org/support/topic/an-unexpected-http-error-occurred-during-the-api-request-on-wordpress-3?replies=37

    The distance of image will three times of object distance.

    Hence, The distance of the screen from the mirror is 3u.

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