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Maharashtra State BoardSSC (English Medium) 10th Standard

Observe the Following Figure and Complete the Table

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Question

Observe the following figure and complete the table:

Points Answer
(i) Position of the object  
(ii) Position of the image  
(iii) Size of the image   
(iv) Nature of the image  
Diagram
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Solution

Points Answer
(i) Position of the object between F1 and optical center
(ii) Position of the image same side to the object
(between 2F1 and F1)
(iii) Size of the image  Magnified
(iv) Nature of the image Virtual and erect
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2018-2019 (March) Set 1

RELATED QUESTIONS

To determine the approximate focal length of the given convex lens by focussing a distant object (say, a sign board), you try to focus the image of the object on a screen. The image you obtain on the screen is always

(a) erect and laterally inverted

(b) erect and diminished

(c) inverted and diminished

(d) virtual, inverted and diminished


Complete the following table:

Instrument Number of Convex
Lenses
Use
Simple Microscope .............. ..............
Compound Microscope .............. ..............
Telescope .............. ..............

Draw a labelled ray diagram to show how a ray of light passes through a parallel-sided glass block if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block).


Where should an object be placed in front of a convex lens so as to obtain its virtual, erect and magnified image?


An object is placed at a distance equal to 2f in front of a convex lens. Draw a labelled ray diagram to show the formation of image. State two characteristics of the image formed.


What type of lens is shown in the diagram on the right? What will happen to the parallel rays of light? Show by completing the ray diagram.


In order to obtain a real image twice the size of the object with a convex lens of focal length 15 cm, the object distance should be:

(a) more than 5 cm but less than 10 cm
(b) more than 10 cm but less than 15 cm
(c) more than 15 cm but less than 30 cm
(d) more than 30 cm but less than 60 cm


A convex lens of focal length 8 cm forms a real image of the same size as the object. The distance between object and its image will be:


Which type of lenses are: 

thicker in the middle than at the edges?


The diagram alongside shows the refraction of a ray of light from sir to a liquid.
(a) write the values of (i) angle of incidence, (ii) angle of refraction.
(b) use snell’s law to find the refractive index of liquid with respect to air. 

 


In figure , name the ray which represents the correct path of light while emerging out through
a glass block. 

 


Study the diagram given below.

  1. Name the lens LL’.
  2. What are the points O and O’ called?
  3. Complete the diagram to form the image of the object AB.
  4. State the three characteristics of the image.
  5. Name a device in which this action of lens is used.

The given below figure shows an object OA and its image IB formed by a lens.


Where should an object be placed in front of a convex lens to get a real image of the size of the object?


Rewrite the following statement by selecting the correct option:
The power of a convex lens is 2.5 dioptres. Its focal length is ______________.

Write the three characteristics of the image formed by a convex lens of focal length 20 cm for the object at distance (i) 10 cm, (ii) 30 cm, (iii) 40 cm, (iv) 60 cm from the lens.


For a specific glass lens f = 0.5 m. This is the only information given to the student. Which type of lens is given to him and what is its power?


The above image shows a thin lens with a focal length of 5m.

  1. What is the kind of lens shown in the above figure?
  2. If a real inverted image is to be formed by this lens at a distance of 7m from the optical centre, then show with calculation where should the object be placed.
  3. Draw a neatly labelled diagram of the image formation mentioned in (ii).

Distinguish between:

Concave lens and Convex Lens


Distinguish between Concave lens and Convex Lens.


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