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An object 4cm tall is placed …

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An object 4cm tall is placed on the principal axis of a concave mirror of focal length 20cm at a distance of 30cm from it.find the position and size of the image.

Posted by Pooja Kumari ?????? 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

Height (h) = 4cm
Since it is a concave mirror therefore f = -20cm
Object distance (u) = -30cm
v = ?
h' = ?
By mirror formula...
1/v + 1/u = 1/f
By putting the above values, we get
v = -60cm
Also, h'/h = -v/u
So we get h' = -8cm
Therefore, the image is real, inverted and magnified..

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