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Question
The height of the image formed by an object of height 10 cm placed in front of a plane mirror is __________.
(a) 5 cm
(b) 10 cm
(c) 15 cm
(d) 20 cm
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Solution
10 cm
The height of the image formed by a plane is always equal to the height of the object placed before it.
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RELATED QUESTIONS
A student wants to project the image of a candle flame on a screen 90 cm in front of a mirror by keeping the flame at a distance of 15 cm from its pole.
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A virtual, erect and magnified image of an object is to be obtained with a convex lens. For this purpose,the object should be placed:
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What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3?
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(c) more than 1 or equal to 1
(d) less than 1, equal to 1 or more than 1
A convex lens produces a magnification of + 5. The object is placed:
(a) at focus
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(d) beyond 2f
To obtain a magnification of, –2 with a convex lens of focal length 10 cm, the object should be placed:
(a) between 5 cm and 10 cm
(b) between 10 cm and 20 cm
(c) at 20 cm
(d) beyond 20 cm
In order to obtain a magnification of, –0.75 with a convex lens of focal length 8 cm, the object should be placed:
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(c) beyond 16 cm
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Magnification produced by a rear view mirror fitted in vehicles ______.
Assertion: The focal length of the mirror is /and the distance of the object from the focus is V then the magnification of the mirror will be `("f"/"f−u")`
Reason: Magnification = `"image distance"/ "object distance"` = `(-"v"/"u")`
