| 1. | Magnification produced by a plane mirror is ? | |
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infinity
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+1
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zero
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-1
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Report Question| 2. | An object 20cm high is placed at a distance of 100 cm from a plane mirror .The size of the image will be ? | |
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100cm
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10cm
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20 cm
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40cm
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| 3. | If the image is formed in front of the mirror, then the image distance will be ? | |
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neither positive nor negative
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positive
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negative
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positive or negative depending on the size of the object
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| 4. | 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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| 5. | The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be ? | |
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virtual, upright and diminished in size
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virtual, upright and enlarged in size
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real, inverted and enlarged in size
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real, inverted and diminished in size
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| 6. | A10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is ? | |
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– 60 cm
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– 40 cm
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– 20 cm
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– 30 cm
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| 7. | When object moves closer to convex lens, the image formed by it shift ? | |
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first away and then towards the lens
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first towards and then away from the lens
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away from the lens
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towards the lens
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| 8. | The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is ? | |
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virtual, upright and enlarged
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virtual, erect and smaller in size
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real, inverted and diminished
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real, inverted and enlarged
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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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Concave mirror, convex mirror, concave lens and convex lens.
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Convex mirror only
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Concave mirror only
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| 10. | According to new cartesian sign convention ? | |
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Focal length of both concave and convex mirrors is positive
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Focal length of concave mirror is negative and that of convex mirror is positive
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Focal length of concave mirror is positive and that of convex mirror is negative
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Focal length of both concave and convex mirrors is negative
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