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Class 10 Science
Light Reflection And Refraction
Quiz 3
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Identify a mirror having focal length -35cm?
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a. convex
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b. concave
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c. plane
An object of height 5 cm is placed at 30 cm from a concave mirror of focal lenght 15 cm.Which one is true
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a. A virtual inverted image will be formed at 10 cm and will be of diminished size then object
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b. A real erect image will be formed at 30 cm and will be of same size as the object
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c. A real inverted image will be formed at 30 cm and will be of same size as the object
The image formed by a convex mirror for an object placed at infinity is?
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a. Behind the mirror at the focus
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b. Behind the mirror between focus and pole
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c. in front of a mirror at the focus
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d. None of these
No matter how far you stand from a mirror, your image appears erect. The mirror may be?
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a. convex
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b. concave
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c. plane
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d. either plane or convex
which of these is false for the plane mirror?
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a. focal lenght is infinite
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b. Power of the plane mirror is zero
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c. Magnification produced is 1
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d. None of these
Which mirror is used as rear-view mirror in vehicles?
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a. convex
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b. concave
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c. plane
when an object is placed at infinity from the concave mirror,the image is formed at?
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a. infinity
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b. radius of curvature
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c. focus
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d. none of these
An object 5.0cm in length is placed at a distance of 20cm in front of a convex mirror of radius of Curvature 30cm. Find the position of the image?
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a. 8.1cm
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b. 8.6 cm
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c. None of these
Find the nature of the image
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a. Virtual, inverted
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b. real inverted
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c. virtual, erect
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d. real, erect
Find the size of the image?
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a. 7.1cm
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b. 5cm
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c. 2.2 cm
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d. None of these
A concave mirror is a part of a sphere of radius 60cm. It's focal length is?
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a. 60cm
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b. 15cm
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c. 30
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d. infinity
A concave mirror produces three times magnified (enlarged) real image of object placed at 10 cm in front of it. Where is the image located?
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a. 30 cm
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b. 3.3 cm
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c. 33 cm
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d. none of these
A ray of light is incident on a concave mirror. If it is parallel to the principal axis, the reflected ray will
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pass through the pole
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retrace its path
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pass through the focus
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pass through the center of curvature
If an incident ray passes through the center of curvature of a spherical mirror, the reflected ray will
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be parallel to the principal axis
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pass through the focus
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retrace its path
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pass through the pole
To get an image larger than the object, one can use
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a convex mirror but not a concave mirror
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a plane mirror
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either a convex mirror or a concave mirror
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a concave mirror but not a convex mirror
A mirror forms a virtual image of a real object.
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it must be a concave mirror.
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it may be any of the mirrors mentioned above
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it must be a convex mirror.
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it must be a plane mirror.
Light cannot travel in a vacuum.
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True
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False
A ray of light incident parallel to the principal axis of a spherical mirror retraces its path after reflection
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True
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False
A ray starting from the focus of a concave mirror becomes parallel to the principal axis after reflection.
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True
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False
The angle of incidence is the angle between
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the normal to the surface and the incident ray.
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the reflected ray and the surface of the mirror.
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the incident ray and the surface of the mirror
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the normal to the surface and reflected ray.
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