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02-Reflection of Light (Assignment).pdf (p.1-8)Reflection of light at plane surfaceBABAReflection of light at spherical surface03-Reflection of Light-Answersheet.pdf (p.9)Reflection of Light 17 Assignment 1. A light bulb is placed between two mirrors (plane) inclined at an angle of 60o. Number of images formed are [NCERT 1980; CPMT 1996, 97; SCRA 1994; AIIMS 1997; RPMT 1999; AIEEE 2002; Orissa JEE 2003; MP PET 2004] (a) 2 (b) 4 (c) 5 (d) 6 2. Two plane mirrors are inclined at an angle of o72. The number of images of a point object placed between them will be [KCET (Engg. & Med.)1999; BCECE 2003] (a) 2 (b) 3 (c) 4 (d) 5 3. To get three images of a single object, one should have two plane mirrors at an angle of [AIEEE 2003] (a) o30 (b) o60 (c) o90 (d) o120 4. A man of length h requires a mirror of length at least equal to, to see his own complete image [MP PET 2003] (a) 4h (b) 3h (c) 2h (d) h 5. Two plane mirrors are at 45o to each other. If an object is placed between them then the number of images will be [MP PMT 2003] (a) 5 (b) 9 (c) 7 (d) 8 6. An object is at a distance of 0.5 m in front of a plane mirror. Distance between the object and image is [CPMT 2002] (a) 0.5 m (b) 1 m (c) 0.25 m (d) 1.5 m 7. A man runs towards a mirror at a speed 15 m/s. The speed of the image relative to the man is [RPMT 1999; Kerala PET 2002] (a) 15 1ms (b) 30 1ms (c) 35 1ms (d) 20 1ms 8. The light reflected by a plane mirror may form a real image [KCET (Engg. & Med.) 2002] (a) If the rays incident on the mirror are diverging (b) If the rays incident on the mirror are converging (c) If the object is placed very close to the mirror (d) Under no circumstances 9. A man is 180 cm tall and his eyes are 10 cm below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1 m from him. The minimum length of the plane mirror required is [MP PMT 1993; DPMT 2001] (a) 180 cm (b) 90 cm (c) 85 cm (d) 170 cm 10. A small object is placed 10 cm infront of a plane mirror. If you stand behind the object 30 cm from the object and look at its image, the distance focused for your eye will be [KCET (Engg.) 2001] (a) 60 cm (b) 20 cm (c) 40 cm (d) 80 cm 11. Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand [MP PMT 1995; UPSEAT 2001] (a) None (b) 1 (c) 2 (d) 3 12. A man runs towards mirror at a speed of 15 m/s. What is the speed of his image [CBSE PMT 2000] BBaassiicc LLeevveell Reflection of light at plane surface O I18 Reflection of Light (a) 7.5 m/s (b) 15 m/s (c) 30 m/s (d) 45 m/s 13. A ray of light is incidenting normally on a plane mirror. The angle of reflection will be [MP PET 2000] (a) 0o (b) 90o (c) Will not be reflected (d) None of these 14. A plane mirror produces a magnification of [MP PMT/PET 1997] (a) – 1 (b) + 1 (c) Zero (d) Between 0 and +  15. When a plane mirror is rotated through an angle , then the reflected ray turns through the angle 2, then the size of the image [MP PAT 1996] (a) Is doubled (b) Is halved (c) Remains the same (d) Becomes infinite 16. What should be the angle between two plane mirrors so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other [KCET 1994; SCRA 1994] (a) 60o (b) 90o (c) 120o (d) 175o 17. Ray optics is valid, when characteristic dimensions are [CBSE PMT 1994] (a) Of the same order as the wavelength of light (b) Much smaller than the wavelength of light (c) Of the order of one millimeter (d) Much larger than the wavelength of light 18. It is desired to photograph the image of an object placed at a distance of 3 m from the plane mirror. The camera which is at a distance of 4.5 m from the mirror should be focussed for a distance of [NCERT 1971] (a) 3 m (b) 4.5 m (c) 6 m (d) 7.5 m 19. Two plane mirrors are parallel to each other an spaced 20 cm apart. An object is kept in between them at 15 cm from A. Out of the following at which point an image is not formed in mirror A (distance measured from mirror A) (a) 15 cm (b) 25 cm (c) 45 cm (d) 55 cm 20. Two plane mirrors A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle of 30o at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is [IIT-JEE (Screening) 2002] (a) 28 (b) 30 (c) 32 (d) 34 21. A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is [IIT-JEE (Screening) 2000] (a) d/2 (b) d (c) 2d (d) 3d 22. The figure shows two rays A and B being reflected by a mirror and going as A' and B'. The mirror is B m32 30o A 0.2m B d A L 2L AAddvvaannccee LLeevveellReflection of Light 19 (a) Plane (b) Concave (c) Convex (d) May be any spherical mirror 23. An object is initially at a distance of 100 cm from a plane mirror. If the mirror approaches the object at a speed of 5 cm/s, then after 6 s the distance between the object and its image will be (a) 60 cm (b) 140 cm (c) 170 cm (d) 150 cm 24. An object placed in front of a plane mirror is displaced by 0.4 m along a straight line at an angle of 30o to mirror plane. The change in the distance between the object and its image is (a) 0.20 m (b) 0.40 m (c) 0.25 m (d) 0.80 m 25. A ray of light travels from A to B with uniform speed. On its way it is reflected by the surface XX'. The path followed by the …

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STMARYTX PHYS 042 - Assignment

Course: Phys 042-
Pages: 9
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