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A student obtained a sharp image of burning candle, placed at the farther end of a laboratory table, on screen using a concave mirror. For getting better value of focal length of the mirror the subject teacher suggested him for focusing a will illuminated distant object. What should student do ? a) He moves the mirror away from screenb) He should move the mirror slightly towards the screenc) He should move the mirror as well as the screen towards the newly selected object.d) He should move only the screen towards the newly selected object.
Asked by Sunil Soni | 20 Feb, 2015, 11:50: PM
answered-by-expert Expert Answer
The correct option is (b) He should move the mirror slightly towards the screen
 
As the subject teacher suggested the student for focusing a will illuminated distant object, the image distance is increased. Due to this the object distance would decrease and thus the distance between the mirror and the screen should be decreased. Therefore, the mirror should be moved slightly towards the screen.
Answered by Yashvanti Jain | 11 Dec, 2017, 06:55: PM

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