| 1. | In case of refraction, if the angle of incidence and the angle of refraction are 45 degrees and 30 degrees respectively, then the angle of deviation is ? | |
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37.5
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7.5
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15
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75
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View Answer
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Report Question| 2. | Between red and violet, which colour has more frequency ? | |
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Red and violet has the same frequency
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Red has more frequency than violet
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Can not say
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Violet has more frequency than red
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| 3. | Which of the following statement is or are correct ? | |
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Light enables us to see objects from which it come or from which it is reflected.
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Those objects which do not emit light themselves but only reflect the light which falls on them, are called non luminous objects.
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Light travels in a straight line.
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All the above
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| 4. | Which mirror can produce a virtual, erect and magnified image of an object ? | |
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Plane mirror
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Both concave and convex mirrors
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Concave mirror
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Convex mirror
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| 5. | The laws of reflection hold good for ? | |
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convex mirror only
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concave mirror only
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all mirrors irrespective of their shape
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plane mirror only
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| 6. | The angle of incidence i and refraction r are equal in a transparent slab when the value of i is ? | |
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90°
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45°
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0°
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depend on the material of the slab
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| 7. | Which of the following mirror is used by a dentist to examine a small cavity ? | |
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Combination of convex and concave mirror
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Concave mirror
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Plane mirror
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Convex mirror
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| 8. | Image formed by reflection from a plane mirror is ? | |
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virtual and inverted
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real and erect
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virtual and erect
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real and inverted
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| 9. | Focal length of a concave mirror is ? | |
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depends on the position of object
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depends on the position of image
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positive
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negative
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| 10. | Sin C = ? | |
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n/2
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n2
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1/n
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n/1
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