Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Physics Reflection of Light
Write down two uses of convex lens?
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Why convex mirror is used as rear view mirror?
Large field of view
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Which mirror have least field of view?
Concave Mirror
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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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An object is placed 30cm away from a spherical mirror. It’s magnification is found to be -1.
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Image is not visible on a rough wooden block. But when the surface is polished an image can be seen. Why?
Irregular reflection occurs on a rough surface. So no image can be seen. On a
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Find out the relation between the given pair and complete the second pair.
M = - v/ u 1/f : ..................
1/f = 1/u + 1/V
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Curved surface of a rubber ball of diameter 24cm is converted to a reflecting surface by completely covering using an aluminium foil.
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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.
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If the height of image is given with negative sign as per new cartesian sign convention, what all peculiarities of object can be identified?
Real and inverted image
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What are the peculiarities of the image formed by a plane mirror?
Virtual, Erect, Same size
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Which mirror forms an erect and diminished image?
In convex mirror
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Which mirror forms an erect and large image?
Concave mirrors
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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.
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An object is kept at a distance of 40cm from a concave mirror of focal length 80cm
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Observe the diagram and complete the following using new cartesian sign convention.
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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.
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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
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An image formed by a concave mirror is shown below.
OB = 5cm( To form image at C, the object must be at C, size of the object and image are equal)
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Observe the diagram and find out the focal length of the mirror
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Vijay and Kiran forms the image of an object on the screen using a concave mirror of focal length 40cm.
a) Vijay
f = -40cm
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Why plane mirrors are used to see the image of face?
Erect, same size images are formed.
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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.
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What will be the nature of image when the magnification is positive in mirrors.
Virtual and erect
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Find out the true statements from the following:
b. When the magnification is greater than one the size of the image will be greater than
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An object of height 8cm is placed 40cm away from a concave mirror. Focal length of the mirror is 20cm.
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An object of height 8cm is placed 40cm away from a concave mirror. Focal length of the mirror is 20cm.
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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)
-7cm
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Concave mirrors are used to construct solar furnaces. Convex mirrors are not used. Why?
Light rays and heat rays coming parallel to the principal axis converges on a point on the principal axis in concave mirrors, convergence of heat radiations are used
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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.
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Diagram of reflection of light rays from a plane mirror is shown below.
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