Download physics chapter light reflection and refraction assignment for class 10 and more Assignments Physics in PDF only on Docsity! Ch-10 (Light) Assignment 1. Why do we see our image in a shining spoon? 2. A ray of light moving along the principal axis is falling on a concave mirror. In which direction is it reflected? 3. At what position the object be placed in front of a concave mirror to form a real image of the same size? 3. Name the type of lens used to obtain (i) an erect, enlarged and virtual image of an object, (ii) an erect, diminished and virtual image of an object. 4. State the condition under which a light ray passes undeviated through a lens. 5. The power of a lens is +5D. Find its focal length in meters. 6. State two positions in which a concave mirror produces a magnified image of a given object. List two differences between the two images. 7. Rama visited a dentist in his clinic. She observed that the dentist was holding an instrument fitted with a mirror. State the nature of this mirror and reason for its use in the instrument used by dentist. 8. Rishi went to a palmist to show his palm. The palmist used a special lens for this purpose. (i) State the nature of the lens and reason for its use. (ii) Where should the palmist place/ hold the lens so as to have a real and magnified image of an object? 9.(i) How can you identify the three types of mirrors without touching them? (ii) What do you mean by focal length of a spherical mirror? 10. A student wants to project the image of a candle flame on the walls of school laboratory by using a lens: (i) Which type of lens should he use? (ii) At what distance in terms of focal length ‘f’ of the lens should he place the candle flame so as to get (a) magnified, and (b) a diminished image respectively on the wall? Draw ray diagram to show the formation of the image. 11. A 5cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20cm. The distance of the object from the lens is 30cm. Find the (i) position, (ii) nature, and (iii) size of the image formed.
