SECTION -C *Section-C consists of three Cases followed by questions. *There are a total of 12 questions in this section. *Attempt any 10 questions from this section. *The first attempted 10 questions would be evaluated. CASET: The lenses form different types of images when object placed at different locations. When a ray is incident parallel to the principal axis, then after refraction, it passes through the focus or appears to come from the focus. When a ray goes through the optical centre of the lens, it passes without any deviation. If the object is placed between focus and optical centre of the convex lens, erect and magnified image is formed. As the object is brought closer to the convex lens from infinity to focus, the image moves away from the convex lens from focus to infinity. Also the size of image goes on increasing and the image is always real and inverted. A concave lens always gives a virtual, erect and diminished image irrespective to the position of the object. 49. The location of image formed by a convex lens when the object is placed at infinity is (a) at focus (b) at 2F (c) at optical centre (d) between Fand 2F 50. When the object is placed at the focus of concave lens, the image formed is (a) real and smaller (b) virtual and inverted (c) virtual and smaller (d) real and erect 51. The size of image formed by a convex lens when the object is placed at the focus of convex lens is (a) small (b) point in size (c) highly magnifie (d) same as that of object 52.At which location of object in front of concave lens, the image between focus and optical centre is formed (a) anywhere between centre and infinit (b) at F (c) at 2F (d) infinity CASE II: Oxidation is the process of gaining of oxygen, or losing of hydrogen Reduction is the process of losing of oxygen or gaining of hydrogen. The
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Answer:
SECTION -C *Section-C consists of three Cases followed by questions. *There are a total of 12 questions in this section. *Attempt any 10 questions from this section. *The first attempted 10 questions would be evaluated. CASET: The lenses form different types of images when object placed at different locations. When a ray is incident parallel to the principal axis, then after refraction, it passes through the focus or appears to come from the focus. When a ray goes through the optical centre of the lens, it passes without any deviation. If the object is placed between focus and optical centre of the convex lens, erect and magnified image is formed. As the object is brought closer to the convex lens from infinity to focus, the image moves away from the convex lens from focus to infinity. Also the size of image goes on increasing and the image is always real and inverted. A concave lens always gives a virtual, erect and diminished image irrespective to the position of the object. 49. The location of image formed by a convex lens when the object is placed at infinity is (a) at focus (b) at 2F (c) at optical centre (d) between Fand 2F 50. When the object is placed at the focus of concave lens, the image formed is (a) real and smaller (b) virtual and inverted (c) virtual and smaller (d) real and erect 51. The size of image formed by a convex lens when the object is placed at the focus of convex lens is (a) small (b) point in size (c) highly magnifie (d) same as that of object 52.At which location of object in front of concave lens, the image between focus and optical centre is formed (a) anywhere between centre and infinit (b) at F (c) at 2F (d) infinity CASE II: Oxidation is the process of gaining of oxygen, or losing of hydrogen Reduction is the process of losing of oxygen or gaining of hydrogen. The
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Explanation:
49 a) focus
50 c) virtual and smaller
51 c) highly magnified
52 a) anywhere b/w centre and infinity