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Numericals:- an object 6cm in size …

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Numericals:- an object 6cm in size is placed at 10cm in front of the concave mirror of focal length is 20 cm what distance from the mirror should be screen placed to obtain a sharp image? find the nature and the size of the image?

Posted by Pankhuri Sharma 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Consider the situation shown in the figure below which also includes the coordinate system.
Here, u=−10cm
f=−20cm
Subtituting in the equation,
1/v + 1/u = 1/f, we get
v = +20cm
Thus, the image is formed 20 cm behind the mirror, magnification +2, erect and virtual.

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