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प्रश्न
An object is kept at 60 cm in front of a plane mirror. If the mirror is now moved 25 cm away from the object, how does the image shift from its previous position?
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उत्तर
Initially, distance of the object from the mirror = 60 cm.
Therefore, image is formed at a distance 60 cm from the mirror, behind it.
Thus, initial distance between the object and image = 60 + 60 = 120 cm
If the mirror is moved 25 cm away from the object,
The new distance of the object from the mirror = 60 + 25 = 85 cm
The new image is now at a distance 85 cm from the mirror behind it.
Thus, new distance of the image from the object = 85 + 85 = 170 cm
Taking the position of the object as reference point, the distance between the two positions of the image = new distance of image from the object - initial distance of the image from the object
= (170 - 120) cm = 50 cm
Thus, the image shifts 50 cm away.
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संबंधित प्रश्न
The diagram in fig. shows an incident ray AO and the normal ON on a plane mirror. Draw the reflected ray. State the law you use to draw the direction of the reflected ray.
Explain the following term :
Plane mirror
Draw diagram/diagrams to show them.
Write three characteristics of the image formed by a plane mirror?
How is the position of an image related to the position of the object?
Why is it difficult to read the image of the text of a page formed due to reflection by a plane mirror?
In the barber's shop, two plane mirrors are placed :
Explain the following term:
Normal Draw
diagram/diagrams to show them.
Prove experimentally that images are formed as far behind in a plane mirror as the object is in front of it.
Calculate the number of images formed in two plane mirrors, when they are held at the angle of (i) 72° (ii) 36°.
A boy stands 4 m away from the plane mirror. If the boy moves `1/2` m towards the mirror, what is now the distance between the boy and his image? Give a reason for your answer.
