मराठी

Consider two statements A and B given below:A : real image is always invertedB : virtual image is always erectOut of these two statements: - Science

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प्रश्न

Consider two statements A and B given below:
A: real image is always inverted
B:  virtual image is always erect
Out of these two statements:

पर्याय

  • Only A is true

  • Only B is true

  • Both A and B are true

  • None is true

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उत्तर

both A and B are true

A real image is always inverted and a virtual image is always erect.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Reflection of Light - Exercise 6 [पृष्ठ २०७]

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लखमीर सिंह Physics (Science) [English] Class 10
पाठ 4 Reflection of Light
Exercise 6 | Q 36 | पृष्ठ २०७

संबंधित प्रश्‍न

Calculate the focal length of a corrective lens having power +2D.


Define the power of a lens.


State power of a lens S.I. unit.


A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?


Fill in the following blank with suitable word: 

For converging lenses, the power is __________ while for diverging lenses, the power is ___________.


The power of a combination of two lenses X and Y is 5 D. If the focal length of lens X be 15 cm :
(a) calculate the focal length of lens Y.
(b) state the nature of lens Y.

 


 What is the unit of power of a lens? Define the unit of power of a lens. 


Express the power (with sign) of a concave lens of focal length 20 cm.


Name the type of lens whose power is positive.
The image of an object formed by a lens is real, inverted and of the same size as the object. If the image is at a distance of 40 cm from the lens, what is the nature and power of the lens ? Draw ray diagram to justify your answer.


Mohan obtained a sharp inverted image of a distant tree on the screen placed behind the lens. He then moved the screen and tried to look through the lens in the direction of the object. He would see: 

(1) a blurred image on the wall of the laboratory. 

(2) an erect image of the tree on the lens.

(3) no image as the screen has been removed 

(4) an inverted image of the tree at the focus of the lens.


A double convex lens has two surfaces of equal radii R and refractive index \[m = 1 \cdot 5\]


A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4 D, the power of a divided lens will be


A screen is placed a distance 40 cm away from an illuminated object. A converging lens is placed between the source and the screen and its is attempted to form the image of the source on the screen. If no position could be found, the focal length of the lens


A convex lens produces a double size real image when an object is placed at a distance of 18 cm from it. Where should the object be placed to produce a triple size real image?


How is accommodation produced?


Complete the diagram to show the formation of the image of the object AB.

(i) Name the Lens LL’.
(ii) Where is the image of the object AB formed?
(iii) State three characteristics of the image.


Power of a lens is – 4D, then its focal length is


Match the following:

Column - I Column - II
1 Retina a Path way of light
2 Pupil b Far point comes closer
3 Ciliary muscles c near point moves away
4 Myopia d Screen of the eye
5 Hypermetropia e Power of accommodation

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