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What Sign (+Ve Or −Ve) Has Been Given to the Following on the Basis of Cartesian Sigh Convention? Height of a Virtual Image. - Science

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प्रश्न

What sign (+ve or −ve) has been given to the following on the basis of Cartesian Sigh Convention? 

Height of a virtual image.

उत्तर

 A positive sign is given to the height of a virtual image.
(Because a virtual image is formed above the principal axis, it's given a positive sign).

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Reflection of Light - Exercise 4 [पृष्ठ १९२]

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लखमीर सिंग Physics (Science) [English] Class 10
अध्याय 4 Reflection of Light
Exercise 4 | Q 6.2 | पृष्ठ १९२

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संबंधित प्रश्न

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.

(a) Suggest the type of mirror he should use.

(b) Determine the linear magnification in this case.

(c) Find the distance between the object and its image.

(d) Draw ray diagram to show the image formation in this case


Where should an object be placed in front of the concave mirror so as to obtain its virtual, erect and magnified image?


 Give two circumstances in which a concave mirror can form a magnified image of an object placed in front of it. Illustrate your answer by drawing labelled ray diagrams for both. 


Describe the New Cartesian Sigh Convention used in optics. Draw a labelled diagram to illustrate this sign convention.


Write down a formula for the magnification produced by a concave mirror. 

 in terms of object distance and image distance


When an object is placed 20 cm from a concave mirror, a real image magnified three times is formed. Find:

(a) the focal length of the mirror.
(b) Where must the object be placed to give a virtual images three times the height of the object? 


A dentist's mirror has a radius of curvature of 3 cm. How far must it be placed from a small dental cavity to give a virtual image of the cavity that is magnified five times?


What is the nature of the image formed by a convex lens if the magnification produced by the lens is +3? 


To obtain a magnification of, –0.5  with a convex lens, the object should be placed:
(a) at F
(b) between optical centre and F
(c) between F and 2F
(d) beyond 2F


Magnification produced by a rear view mirror fitted in vehicles ______.


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