The magnification of an image formed by plane mirror is +1. What does this mean?

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Chapter 9 NCERT Class 10 Science SOLUTIONS

13. The magnification of an image formed by plane mirror is +1. What does this mean?

Question:

The magnification of an image formed by plane mirror is +1. What does this mean?

Answer:

The image formed by plane mirror has m = +1. Plus (+) sign represent that the image is virtual and erect. In this mirror, the size of an image is equal to that of an object.

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(All Q's of this Chapter solved)

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A doctor prescribes a rectifier lens of power +1.5 D. Find the focal length of the lens. Is the lens converging or diverging?

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An object of size 7.0 cm is placed at a distance of 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed so that a clear focused image of the object is formed? Find the size and nature of an object.

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An object of length 0.5 cm is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position, nature and size of the image.

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Cover the half of a convex lens with black paper. Will this lens be able to form a complete image of an object? Check your answer with the help of an experiment. Explain your observations.

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Name the mirror used for the following situations : (a) Headlight of a car (b) Side mirror/ rear mirror of a vehicle (c) Solar furnace Explain your answers.

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Using a concave mirror of focal length 15 cm, we want to form an erect image of an object. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image bigger or smaller than the object? Draw a ray diagram of the image formation for this case.

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Which of the following lenses would you prefer while reading small letters in a dictionary? (a) A convex lens with focal length of 50 cm (b) A concave lens with focal length of 50 cm (c) A convex lens with focal length of 5 cm (d) A concave lens with focal length of 5 cm

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