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Ever wondered how camera capture a moment ? When you click the shutter, an image is refracted on to a light sensitive surface, giving a snapshot of your birthday property.1. What kind of lens is used in camera?a. Convex lensb. Plane lensc. Concave lensd. None of these2. The lens in the camera produces a ____ image.a. Real and erectb. Virtual and erectc. Real and invertedd. Virtual and inverted3. The power of concave lens is negative and convex lens is _____a. Positiveb. Negative4. The light rays which falling on a convex lens will converge at a point called a. Centre of curvatureb. Radius of curvaturec. Optical centred. Focus5. A convex lens has a focal length of 10 cm. At what distance from the lens should the object be placed so that it forms a real and inverted image 40 cm away from the lens?a. 10 cmb. 20 cmc. 30 cmd. 40 cm |
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Answer» 1. a. Convex lens 2. c. Real and inverted 3. a. Positive 4. d. Focus 5. b. 20 cm |
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