| 1. | An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is ? | |
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+15 cm
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– 15 cm
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30 cm
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– 30 cm
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Report Question| 2. | If an incident ray passes through the focus, the reflected ray will ? | |
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pass through the centre of curvature
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retrace its path
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be parallel to the principal axis
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pass through the pole
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| 3. | The Angle of reflection is equal to the angle of incidence ? | |
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Sometimes
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Never
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Under special conditions
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Always
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| 4. | Magnification produced by a rear-view mirror fitted in vehicles ? | |
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is equal to one
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is more than one
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is less than one
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can be more than or less than one depending upon the position of the object in front of it
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| 5. | When object moves closer to a concave lens the image by it shift ? | |
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first towards and then away from the lens
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away from the lens on the other side of lens
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away from the lens on the same side of object
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toward the lens
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| 6. | The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be ? | |
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between focus and centre of curvature
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beyond centre of curvature
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at the focus
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at the centre of curvature
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| 7. | For a real object, which of the following can produce a real image ? | |
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Convex mirror
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Concave lens
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Concave mirror
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Plane mirror
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| 8. | The angle of incidence for a ray of light having 45° reflection angle is ? | |
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90°
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45°
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0°
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30°
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| 9. | In which of the following, the image of an object placed at infinity will be highly diminished and point sized ? | |
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Convex lens only
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Convex mirror only
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Concave mirror, convex mirror, concave lens and convex lens
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Concave mirror only
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| 10. | The refractive index of a medium with respect to vacuum is ? | |
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Equal to one
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Always greater than one
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Always less than one
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none of the above
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