1. virtual, upright, height = 0.5 cm
2. real, inverted, height = 4 cm
3. real, inverted, height = 1 cm
4. virtual, upright, height = 1 cm
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens is :
1. 5 cm
2. -10 cm
3. 20 cm
4. -30 cm
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA lens having focal length f and aperture of diameter d forms an image of intensity I . An aperture of diameter in central region of lens is covered by a black paper. The focal length of lens and intensity of the image now will be respectively:
1. f and
2.
3. f and
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is :
1.
2.
3.
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is 1.39 x109 m and its mean distance from the earth is 1.5 x 1011 m. What is the diameter of the sun's image on the paper?
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA convex lens and a concave lens, each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power in dioptres of the combination is:
1. 25
2. 50
3. infinite
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology