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Question
How can a concave mirror be used to obtain a virtual image of an object? Draw a diagram to illustrate your answer.
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Solution
A concave mirror forms a virtual image of an object when the object is placed between focus and mirror (pole)
A virtual, erect and bigger image is formed behind the mirror
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RELATED QUESTIONS
A student obtained a sharp image of a candle flame placed at the distant end of the laboratory table on a screen using a concave mirror to determine its focal length. The teacher suggested him to focus a distant building, about 1 km away from the laboratory, for getting more correct value of the focal length. In order to focus the distant building on the same screen, the student should slightly move the
(a) mirror away from the screen
(b) screen away from the mirror
(c) screen towards the mirror
(d) screen towards the building
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