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An object of 8cm in size …

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An object of 8cm in size is placed at 25 in front of a concave mirror of focal length of 30 cm at what distance from the mirror should o screen be placed in order to obtained a sharp image also find nature,size of image

Posted by Mridul Mridul 7 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Sujay Suju 7 years, 1 month ago

f= -30cm , u = -25cm , ho = 8cm . 1/f = 1/u + 1/v v = +150 cm. Therefore screen should be placed at 150cm in front of mirror m = hi/ho = -v/u Therefore , height of image (hi) = 48cm. Nature of image is virtual and erect since, hi is positive . Size of image is magnified.

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