Question Pool Reflection of Light

Reflection of Light - SAMAGRA Question Pool & Answers | Class 10 English Medium

Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Physics Reflection of Light

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Qn 1.

Write down two uses of convex lens?



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Qn 2.

Why convex mirror is used as rear view mirror?



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Qn 3.
Which mirror have least field of view?



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Qn 4.

A motorbike rider sees the image of a car in the rear view mirror diminished 1/6 of its original size. If the real distance between the car and bike is 30cm. Calculate it’s radius of curvature.



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Qn 5.

An object is placed 30cm away from a spherical mirror. It’s magnification is found to be -1.

  1. Write the peculiarities of the image. 
  2. Which mirror is used here?
  3. If the object is placed 10cm away from the mirror, what change will occur to the nature of image formed
  4. Justify your conclusions


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Qn 6.

Image is not visible on a rough wooden block. But when the surface is polished an image can be seen. Why?



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Qn 7.

Find out the relation between the given pair and complete the second pair.

M = - v/ u                                                                                                                                    1/f : ..................



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Qn 8.

Curved surface of a rubber ball of diameter 24cm is converted to a reflecting surface by completely covering using an aluminium foil.

  1. Where will the image be formed if the object is placed at a distance of 24cm away fromm the centre, r of the ball.
  2. Is the image real or virtual?

 



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Qn 9.

A spherical mirror forms a real image at the same position of the object placed at a distance of 20cm in front of the mirror.

  1. What type of mirror is this?
  2. What is the magnification? Justify your answer.
  3. Find out the focal length and radius of curvature of the mirror.


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Qn 10.

If the height of image is given with negative sign as per new cartesian sign convention, what all peculiarities of object can be identified?



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Qn 11.

What are the peculiarities of the image formed by a plane mirror?



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Qn 12.

Which mirror forms an erect and diminished image?



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Qn 13.

Which mirror forms an erect and large image?



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Qn 14.

A lighted candle is kept at a distance of 40cm from a concave mirror of focal length 25cm. It’s image is formed on a screen.

  1. How far from the mirror the clear image is formed?
  2. Find out the magnification.
  3. Draw the ray diagram of the image formation and mark the values in the diagram

 



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Qn 15.

An object is kept at a distance of 40cm from a concave mirror of focal length 80cm

  1. Calculate the distance to the image from the mirror.
  2. Mark ‘U’, ‘V’, and ‘f’ after drawing the ray diagram of the image formation


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Qn 16.

Observe the diagram and complete the following using new cartesian sign convention.

  1. Height of image .......................
  2. Height of object ..........................
  3. Distance from the pole to the object .....................
  4. Distance from the pole to the image ....................

 



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Qn 17.

An object is placed 20cm away in front of a concave mirror. A real image is formed at a distance of 32cm from the mirror.

  1. What is the magnification in this experiment?
  2. Calculate the focal length of the mirror.


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Qn 18.

When an object is placed at a distance of 1.25m from the pole of concave mirror real image is formed at a distance of 6.25m

  1. Find out the focal length of the concave mirror.
  2. Draw the diagram and mark the measurements.

 



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Qn 19.

An image formed by a concave mirror is shown below.

  1. Where is the position of object?
  2. Find out the height of object.
  3. Write the peculiarities of the image.


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Qn 20.

Observe the diagram and find out the focal length of the mirror



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Qn 21.

Vijay and Kiran forms the image of an object on the screen using a concave mirror of focal length 40cm.

  1. Vijay places the object at a distance of 80cm and conduct the experiment. How far the screen be placed to get a clear image?
  2. Kiran places the object at a distance of 10cm and conduct the experiment. Then how far the screen be placed to get a clear image?
  1. Screen must be placed 80cm away from the pole of the mirror.
  2. Screen must be placed 60cm away from the pole of the mirror.


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Qn 22.

Why plane mirrors are used to see the image of face?



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Qn 23.

Radha used three mirrors to look her face. She found the size of image different in three occasions. Identify the mirrors by understanding difference in the size of image formed.

  1. Image of face is big.i
  2. Image of face is small
  3. Image of same size


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Qn 24.

What will be the nature of image when the magnification is positive in mirrors.



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Qn 25.

Find out the true statements from the following:

  1. When the magnification is greater than one, the size of the image is less than object.
  2. When the magnification is greater than one. The size of the image is greater than object.
  3. When the magnification is positive, image will be real and inverted.
  4. When the magnification is negative, image will be virtual and inverted.


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Qn 26.

An object of height 8cm is placed 40cm away from a concave mirror. Focal length of the mirror is 20cm.

  1. Where is the image formed?
  2. Write down the height of image using new cartesian sign convention.


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Qn 27.

An object of height 8cm is placed 40cm away from a concave mirror. Focal length of the mirror is 20cm.

  1. Where is the image formed?
  2. Write down the height of image using new cartesian sign convention.


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Qn 28.

An object of height 10cm is placed at a distance of 50cm from a concave mirror. Focal length of the mirror is 20cm. Which among the following could be the height of image?

( +10cm, -10cm, +7cm, -7cm)



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Qn 29.

Concave mirrors are used to construct solar furnaces. Convex mirrors are not used. Why?



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Qn 30.

Two plane mirrors are arranged by joining their sides to form a particular angle between them. If the object is placed at the perpendicular bisector of the angle. Calculate the number of images formed for the following angles.

  1. 900
  2. 600


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Qn 31.

Diagram of reflection of light rays from a plane mirror is shown below.

  1. What type of image is formed at the point
  2. What are the peculiarities of the image formed?


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