Lakhmir Singh & Manjit Kaur - Physics

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Q. 385.0( 4 Votes )

A virtual, erect and magnified image of an object is to be produced with a concave mirror of focal length 14 Cm. Which of the following object distance should be chosen for this purpose ?

(i) 10 Cm (ii) 15 Cm (iii) 20 Cm

Give reasons for your choice.

Class 10th Lakhmir Singh & Manjit Kaur - Physics 4. Reflection of light

Answer :

10 cm, as image formed is virtual, erect and magnified if the object is placed between the pole and focus of the concave mirror only.

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PREVIOUSAn object is 200 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is:A) less than 200 mmB) between 200 mm and 400 mmC) exactly 400 mmD) more than 400 mm NEXTA concave mirror has a focal length of 22 Cm. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror ?(a) 45 cm(b) 20 cm(c) 25 cm(d) 30 cmGive reason for your choice.

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Lakhmir Singh & Manjit Kaur - Physics