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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
Write three characteristics of the image formed by a plane mirror?
Why is it difficult to read the image of the text of a page formed due to reflection by a plane mirror?
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?
State two uses of a plane mirror.
Two plane mirrors are placed making an angle 60° in between them. For an object placed in between the mirrors, the number of images formed will be :
By drawing a neat diagram define the following:
Mirror
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.
Parallel rays are incident:
- on regular surface and
- on irregular surface. In what respect do reflected rays in (1) differ from those of (2)?
