Physics
Grade-10
Easy
Question
An extended object is placed above the principal axis, what should be the sign on the height of this object?
- Positive
- Negative
Hint:
The height of the object is taken as + (positive), when placed above the principal axis and taken as – (negative) when placed below the principal axis.
The correct answer is: Positive
When an extended object is placed above the principal axis, the sign on the height of this object should be positive.
- The sign of the magnification is related to the size and position of the image.
- According to the sign conventions, if the image formed above the principal axis, it bears a positive sign.
- Thus the signs on the height of this object extended above the principal axis are positive.
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