A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror, For getting better value of focal length of the mirror, the subject teacher suggested him for focusing a well illuminated distant object.what should the student do. Explain the reason
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The student can move the object well beyond the focal length of the mirror so that the image gets foccused at the principal focus of the mirror and a distinct image can be obtained
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He should move the screen towards the mirror.
Explanation- the burning candle is at finite distance but beyond 2f so the image will form between f and 2f. Now the object is at infinity so the image will form at focus and focus is near the mirror therefore in order to get the image of a distant object he should move the screen towards the mirror
Hope it helps.
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