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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:

विकल्प

  • Only A is true

  • Only B is true

  • Both A and B are true

  • None is true

MCQ
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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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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Reflection of Light - Exercise 6 [पृष्ठ २०७]

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

संबंधित प्रश्न

Define the power of a lens.


State power of a lens S.I. unit.


Find the focal length of a lens of power −2.0 D. What type of lens is this?


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


 A combination of lenses for a camera contains two converging lenses of focal lengths 20 cm and 40 cm and a diverging lens of focal length 50 cm. Find the power and focal length of the combination.A optical instrument in which the above arrangement of convex lens is used is a convex lens used to burn paper by focusing sunlight. 


State the condition for the following a lens has both its focal lengths equal .


Define power of a lens. Write its units. Deduce the relation `1/f =1/f_1  +1/f_2`for two thin lenses kept in contact coaxially.


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?


The following diagram shows the object O and the image I formed by a lens. Copy the diagram and on it mark the positions of the lens LL’ and focus (F). Name the lens.


A stick partly immersed in water appears to be bent. Draw a ray diagram to show the bending of the stick when placed in water and viewed obliquely from above.


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.


A convex lens is of focal length 20 cm. Find its power.


If focal length of a convex lens is 20 cm at what is the power of the lens?


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


Increase in the converging power of eye lens cause ‘hypermetropia'


The above lens has a focal length of 10 cm. The object of height 2 mm is placed at a distance of 5 cm from the pole. Find the height of the image.


Define power of a lens. What is its unit? One student uses a lens of focal length 50 cm and another of –50 cm. What is the nature of the lens and its power used by each of them?


An object is placed in front of a converging lens. Obtain the conditions under which the magnification produced by the lens is

  1. negative and
  2. positive.

The power of convex lens of focal length 20 cm is ______.


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