Physics - Light

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6. The image formed by a convex lens when the object lies at the focus is (NTSE Mizoram, Stage-I, 2012-13)

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Option : C
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7. Two different sources of light A and B have wavelength 0.7 μm and 0.3 μm respectively. Then which of the following statement is true? (NTSE Delhi, Stage-I, 2012-13)

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Option : B
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8. An object is placed in front of a concave mirror of radius of curvature 15 cm, at a distance of 10 cm. The position and nature of the image formed is (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)

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Option : D
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9. If a lens has power -2.5, then it is a (NTSE Madhya Pradesh, Stage-I, 2012-13)

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Option : B
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10. What should be the minimum height of a plane mirror so that a 6 ft tall man can see his full view image standing in front of the mirror? (NTSE Odisha, Stage-I, 2012-13)

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Option : C
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