Chapter 1: Light - Reflection and Refraction

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Light - Reflection and Reflection


We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.


The concave mirror forms an erect image when object is placed between the pole(p) and principal focus(F).

Therefore, the range of distance of object from the mirror is from 0 cm to 15 cm.

The nature of the image formed when object is placed between principal focus(F) and pole(P) is virtual, erect and enlarged.

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