CBSE Class 10 Science 2023 Outside Delhi Set 1

Question : 7 of 39

Marks: +1, -0

A student wants to obtain an erect image of an object using a concave mirror of

10 {\cm}

focal length. What will be the distance of the object from mirror?

Less than $10 {\cm}$
$10 {\cm}$
between $10 {\cm}$ and $20 {\cm}$
more than $20 {\cm}$

Solution:

Explanation: A concave mirror produces an erect image only when the object is placed between pole and focus.
Now,
Distance between pole and focus = Focal length

=10 {\cm}

Hence, the object can be placed at a distance of less than

10 {\cm}

in from of the mirror.
As a result, the nature of the image formed when object is placed between pole and focus of concave mirror is virtual, erect and enlarged.

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