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प्रश्न
An optician while testing the eyes of a patient keeps a chart of letters 3 m behind the patient and asks him to see the letters on the image of chart formed in a plane mirror kept at distance 2 m in front of him. At what distance is the chart seen by the patient?
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उत्तर
Distance between man and chart = 3m
Distance between man and mirror = 2m
Therefore, distance between chart and mirror = 5 m
Now, final image is formed on the mirror, which is at a distance of 2 m from the man, therefore, the chart as seen by patient is (5m + 2m =) 7m away.
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संबंधित प्रश्न
Explain the following term :
Plane mirror
Draw diagram/diagrams to show them.
Two plane mirrors are placed making an angle θ in between them. Write an expression for the number of images formed of an object placed in between the mirrors. State the condition, if any.
How many images are formed for a point object kept in between two plane mirrors at right angles to each other? Show them by drawing a ray diagram.
Two plane mirrors are arranged parallel and facing each other at some separation. How many images are formed for a point object kept in between them? Show the formation of images with the help of a ray diagram
In the barber's shop, two plane mirrors are placed :
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°.
Draw a neat two ray diagram for the formation of images in two plane mirrors, when mirrors are at facing each other.
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.
Select the correct option:
In case of concave mirror, the minimum distance between an object and its real image is:
